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Epson 1400 vs 1800

Epson 1400 vs 1800

2007-05-28 by Myron Gochnauer

For purely B&W printing using 3rd party B&W inks, is there any  
advantage to the Epson 1800 over the 1400?

Both have 1.5 picolitre jets, and both will handle 13" paper. The  
1800 has eight heads, while the 1400 has six, but this should not be  
an issue with B&W.

Will QTR work with the 1400?  Aside from that, is there any reason I  
should not save the $150-$200 and get the 1400?

[ I'm thinking specifically of Tom's carbon-only recommendations for  
the 800/1800. ]

Myron

RE: [Digital BW] Epson 1400 vs 1800

2007-05-28 by Paul Roark

Hi Myron,

>For purely B&W printing using 3rd party B&W inks, 
>is there any advantage to the Epson 1800 over the 1400?

I'm waiting for my 260 to arrive.  I'll let people know as soon as I can get
it running with my new approach.  Hopefully, I'll have the multi-channel
Eboni approach running in that under $100 printer soon.

>Both have 1.5 picolitre jets, and both will handle 13" paper. 
>The 1800 has eight heads, while the 1400 has six, but this 
>should not be an issue with B&W.

Yes, 3 channels appears to be all that are needed.

>Will QTR work with the 1400? 

I expect QTR support is not too far off.  Also, I think I can set up an
Epson driver workflow with the 260/1400.

>Aside from that, is there any reason I 
>should not save the $150-$200 and get the 1400?

The relative build quality and paper handling will be issues I'll be looking
at.  One the one hand the 1400 is a second generation 1.5 pl machine, so
Epson may actually have learned a few lessons that will allow it to improve
the printing.  On the other hand, it's cheaper.  Some of the cheaper
printers show it.

Paul
www.PaulRoark.com

Re: [Digital BW] Epson 1400 vs 1800

2007-05-28 by Carl Schofield

Paul,

Do you know what the dot size distribution is across the tonal scale  
for these "1.5 pl" printers?  Epson describes the new printers, not  
as 1.5 pl printers, but rather Dx5 variable drop size.  I'd assume  
that the smallest drop size (1.5pl) is used only in the highlights,  
but I don't really know that.  Here is Epson's blurb:
"With DX5 (droplets x 5 sizes), each nozzle has advanced capabilities  
to discern and adjust the ink droplet size based on the needs of your  
print job."

Can you look at a 21 step printed grayscale and actually see  
different drop sizes on the print?  Could also be resolution  
dependent where smallest drop sizes are only used at highest printing  
resolution.

Carl

On May 28, 2007, at 3:24 PM, Paul Roark wrote:

> Hi Myron,
>
>> For purely B&W printing using 3rd party B&W inks,
>> is there any advantage to the Epson 1800 over the 1400?
>
> I'm waiting for my 260 to arrive.  I'll let people know as soon as  
> I can get
> it running with my new approach.  Hopefully, I'll have the multi- 
> channel
> Eboni approach running in that under $100 printer soon.
>
>> Both have 1.5 picolitre jets, and both will handle 13" paper.
>> The 1800 has eight heads, while the 1400 has six, but this
>> should not be an issue with B&W.
>
> Yes, 3 channels appears to be all that are needed.
>
>> Will QTR work with the 1400?
>
> I expect QTR support is not too far off.  Also, I think I can set  
> up an
> Epson driver workflow with the 260/1400.
>
>> Aside from that, is there any reason I
>> should not save the $150-$200 and get the 1400?
>
> The relative build quality and paper handling will be issues I'll  
> be looking
> at.  One the one hand the 1400 is a second generation 1.5 pl  
> machine, so
> Epson may actually have learned a few lessons that will allow it to  
> improve
> the printing.  On the other hand, it's cheaper.  Some of the cheaper
> printers show it.
>
> Paul
> www.PaulRoark.com



[Non-text portions of this message have been removed]

RE: [Digital BW] Epson 1400 vs 1800

2007-05-29 by Paul Roark

Hi Carl,

 

Since I've been using QTR, I'm not sure how Epson has its driver set up, and
I'll defer to Roy with respect to QTR. 

 

I have not had a chance to see what I can do with the Epson driver and 260,
but I'll try that first with that printer.

 

I suspect there is more to be had from these drivers and learning how to
better control the dither pattern and dot size.  There is actually a chance
that dot size control might give some tone control.  I feel that I'm sort of
just scratching the surface now.

 

Paul

www.PaulRoark.com <http://www.paulroark.com/>  

 

 

  _____  
Show quoted textHide quoted text
From: DigitalBlackandWhiteThePrint@yahoogroups.com
[mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On Behalf Of Carl
Schofield
Sent: Monday, May 28, 2007 2:27 PM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: Re: [Digital BW] Epson 1400 vs 1800

 

Paul,

Do you know what the dot size distribution is across the tonal scale 
for these "1.5 pl" printers? Epson describes the new printers, not 
as 1.5 pl printers, but rather Dx5 variable drop size. I'd assume 
that the smallest drop size (1.5pl) is used only in the highlights, 
but I don't really know that. Here is Epson's blurb:
"With DX5 (droplets x 5 sizes), each nozzle has advanced capabilities 
to discern and adjust the ink droplet size based on the needs of your 
print job."

Can you look at a 21 step printed grayscale and actually see 
different drop sizes on the print? Could also be resolution 
dependent where smallest drop sizes are only used at highest printing 
resolution.

Carl

On May 28, 2007, at 3:24 PM, Paul Roark wrote:

> Hi Myron,
>
>> For purely B&W printing using 3rd party B&W inks,
>> is there any advantage to the Epson 1800 over the 1400?
>
> I'm waiting for my 260 to arrive. I'll let people know as soon as 
> I can get
> it running with my new approach. Hopefully, I'll have the multi- 
> channel
> Eboni approach running in that under $100 printer soon.
>
>> Both have 1.5 picolitre jets, and both will handle 13" paper.
>> The 1800 has eight heads, while the 1400 has six, but this
>> should not be an issue with B&W.
>
> Yes, 3 channels appears to be all that are needed.
>
>> Will QTR work with the 1400?
>
> I expect QTR support is not too far off. Also, I think I can set 
> up an
> Epson driver workflow with the 260/1400.
>
>> Aside from that, is there any reason I
>> should not save the $150-$200 and get the 1400?
>
> The relative build quality and paper handling will be issues I'll 
> be looking
> at. One the one hand the 1400 is a second generation 1.5 pl 
> machine, so
> Epson may actually have learned a few lessons that will allow it to 
> improve
> the printing. On the other hand, it's cheaper. Some of the cheaper
> printers show it.
>
> Paul
> www.PaulRoark.com

[Non-text portions of this message have been removed]

 



[Non-text portions of this message have been removed]

Re: [Digital BW] Epson 1400 vs 1800

2007-05-29 by Roy Harrington

I've got an R260 that I've started playing with -- I expect the 1400 is pretty similar.
The Epson's touting of 5 drop sizes is a bit of marketing hype IMO.  It's still a 3 dropsizes
at a time printer just like all the other recent printers.   The difference is that they
have more choices in what 3 sizes can be used but you must still pick the set of 3
before any printing.

The thing to realize in all cases is that the smallest size determines the dottiness in
the highlights, the largest size times the resolution must be enough to provide
enough ink for dMax.  The old printers always gave you 3 sizes that were consecutive
like 1,2,3 or 2,3,4 the R260 has 1,2,3 or 1,2,4 or 1,3,5 or 2,3,5.   Does all this make
a difference?  It's hard to tell.  I expect low res, fast printing may benefit but for the
best high res printing it's probably a toss up.

I think one of the advantages of Paul's multi-eboni approach is that he can keep the
ink limits of the individual channels low enough to stay in the small dot range but
still get to dMax because he has multiple channels firing.

Roy


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Carl Schofield <list@...> wrote:
Show quoted textHide quoted text
>
> Paul,
> 
> Do you know what the dot size distribution is across the tonal scale  
> for these "1.5 pl" printers?  Epson describes the new printers, not  
> as 1.5 pl printers, but rather Dx5 variable drop size.  I'd assume  
> that the smallest drop size (1.5pl) is used only in the highlights,  
> but I don't really know that.  Here is Epson's blurb:
> "With DX5 (droplets x 5 sizes), each nozzle has advanced capabilities  
> to discern and adjust the ink droplet size based on the needs of your  
> print job."
> 
> Can you look at a 21 step printed grayscale and actually see  
> different drop sizes on the print?  Could also be resolution  
> dependent where smallest drop sizes are only used at highest printing  
> resolution.
> 
> Carl
> 
> On May 28, 2007, at 3:24 PM, Paul Roark wrote:
> 
> > Hi Myron,
> >
> >> For purely B&W printing using 3rd party B&W inks,
> >> is there any advantage to the Epson 1800 over the 1400?
> >
> > I'm waiting for my 260 to arrive.  I'll let people know as soon as  
> > I can get
> > it running with my new approach.  Hopefully, I'll have the multi- 
> > channel
> > Eboni approach running in that under $100 printer soon.
> >
> >> Both have 1.5 picolitre jets, and both will handle 13" paper.
> >> The 1800 has eight heads, while the 1400 has six, but this
> >> should not be an issue with B&W.
> >
> > Yes, 3 channels appears to be all that are needed.
> >
> >> Will QTR work with the 1400?
> >
> > I expect QTR support is not too far off.  Also, I think I can set  
> > up an
> > Epson driver workflow with the 260/1400.
> >
> >> Aside from that, is there any reason I
> >> should not save the $150-$200 and get the 1400?
> >
> > The relative build quality and paper handling will be issues I'll  
> > be looking
> > at.  One the one hand the 1400 is a second generation 1.5 pl  
> > machine, so
> > Epson may actually have learned a few lessons that will allow it to  
> > improve
> > the printing.  On the other hand, it's cheaper.  Some of the cheaper
> > printers show it.
> >
> > Paul
> > www.PaulRoark.com
> 
> 
> 
> [Non-text portions of this message have been removed]
>

Re: [Digital BW] Epson 1400 vs 1800

2007-05-29 by Carl Schofield

Roy,

Thanks for clarifying the dot sizes question.  Is it also necessary  
to use the highest print resolution to ensure that the smallest dot  
sizes will be used or is there no relationship between resolution and  
dot sizes?

Carl
Show quoted textHide quoted text
On May 29, 2007, at 12:11 AM, Roy Harrington wrote:

>
> I've got an R260 that I've started playing with -- I expect the  
> 1400 is pretty similar.
> The Epson's touting of 5 drop sizes is a bit of marketing hype  
> IMO.  It's still a 3 dropsizes
> at a time printer just like all the other recent printers.   The  
> difference is that they
> have more choices in what 3 sizes can be used but you must still  
> pick the set of 3
> before any printing.
>
> The thing to realize in all cases is that the smallest size  
> determines the dottiness in
> the highlights, the largest size times the resolution must be  
> enough to provide
> enough ink for dMax.  The old printers always gave you 3 sizes that  
> were consecutive
> like 1,2,3 or 2,3,4 the R260 has 1,2,3 or 1,2,4 or 1,3,5 or  
> 2,3,5.   Does all this make
> a difference?  It's hard to tell.  I expect low res, fast printing  
> may benefit but for the
> best high res printing it's probably a toss up.
>
> I think one of the advantages of Paul's multi-eboni approach is  
> that he can keep the
> ink limits of the individual channels low enough to stay in the  
> small dot range but
> still get to dMax because he has multiple channels firing.
>
> Roy
>
>
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Carl Schofield  
> <list@...> wrote:
>>
>> Paul,
>>
>> Do you know what the dot size distribution is across the tonal scale
>> for these "1.5 pl" printers?  Epson describes the new printers, not
>> as 1.5 pl printers, but rather Dx5 variable drop size.  I'd assume
>> that the smallest drop size (1.5pl) is used only in the highlights,
>> but I don't really know that.  Here is Epson's blurb:
>> "With DX5 (droplets x 5 sizes), each nozzle has advanced capabilities
>> to discern and adjust the ink droplet size based on the needs of your
>> print job."
>>
>> Can you look at a 21 step printed grayscale and actually see
>> different drop sizes on the print?  Could also be resolution
>> dependent where smallest drop sizes are only used at highest printing
>> resolution.
>>
>> Carl
>>
>> On May 28, 2007, at 3:24 PM, Paul Roark wrote:
>>
>>> Hi Myron,
>>>
>>>> For purely B&W printing using 3rd party B&W inks,
>>>> is there any advantage to the Epson 1800 over the 1400?
>>>
>>> I'm waiting for my 260 to arrive.  I'll let people know as soon as
>>> I can get
>>> it running with my new approach.  Hopefully, I'll have the multi-
>>> channel
>>> Eboni approach running in that under $100 printer soon.
>>>
>>>> Both have 1.5 picolitre jets, and both will handle 13" paper.
>>>> The 1800 has eight heads, while the 1400 has six, but this
>>>> should not be an issue with B&W.
>>>
>>> Yes, 3 channels appears to be all that are needed.
>>>
>>>> Will QTR work with the 1400?
>>>
>>> I expect QTR support is not too far off.  Also, I think I can set
>>> up an
>>> Epson driver workflow with the 260/1400.
>>>
>>>> Aside from that, is there any reason I
>>>> should not save the $150-$200 and get the 1400?
>>>
>>> The relative build quality and paper handling will be issues I'll
>>> be looking
>>> at.  One the one hand the 1400 is a second generation 1.5 pl
>>> machine, so
>>> Epson may actually have learned a few lessons that will allow it to
>>> improve
>>> the printing.  On the other hand, it's cheaper.  Some of the cheaper
>>> printers show it.
>>>
>>> Paul
>>> www.PaulRoark.com
>>

Re: [Digital BW] Epson 1400 vs 1800

2007-05-30 by dlruckus

Hi Roy.
Any chance selectable dot size per channel could be used with QTR in
that context? I've often thought that utilizing the multi BO concept
Paul is working with here could quite possibly be of use with uncoated
art papers. Perhaps a 2K approach could even be used with some of the
older machines.

Regards
Duane




--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
<roy@...> wrote:
>
> 
> I think one of the advantages of Paul's multi-eboni approach is that
he can keep the
> ink limits of the individual channels low enough to stay in the
small dot range but
Show quoted textHide quoted text
> still get to dMax because he has multiple channels firing.
> 
> Roy
>

Re: [Digital BW] Epson 1400 vs 1800

2007-05-30 by Roy Harrington

Duane,

The set of dotsizes applies for all the channels on a page, so there is no variation
per channel.  I really don't think you'd find much benefit messing around with
lots of different dotsizes.

Roy

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dlruckus" <dlruckus@...> 
wrote:
Show quoted textHide quoted text
>
> Hi Roy.
> Any chance selectable dot size per channel could be used with QTR in
> that context? I've often thought that utilizing the multi BO concept
> Paul is working with here could quite possibly be of use with uncoated
> art papers. Perhaps a 2K approach could even be used with some of the
> older machines.
> 
> Regards
> Duane
> 
> 
> 
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
> <roy@> wrote:
> >
> > 
> > I think one of the advantages of Paul's multi-eboni approach is that
> he can keep the
> > ink limits of the individual channels low enough to stay in the
> small dot range but
> > still get to dMax because he has multiple channels firing.
> > 
> > Roy
> >
>

Re: [Digital BW] Epson 1400 vs 1800

2007-05-30 by Roy Harrington

Each printer is a little different.   The relationship is based on this:
> > The thing to realize in all cases is that the smallest size  
> > determines the dottiness in
> > the highlights, the largest size times the resolution must be  
> > enough to provide enough ink for dMax.  
For the R800/R1800 you need 2880 or 1440x1440 to get the 1.5pl drop.
At 1440x720 you need a bigger big dot and that goes with a bigger small dot.

The R260 is special in that a 1.5 drop is available with a bigger big dot so it
can still be used at 1440x720.  You always pick the set of 3 based on the big
dot and resolution -- then what size small dot is whatever comes with it.

Roy

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Carl Schofield <list@...> 
wrote:
Show quoted textHide quoted text
>
> Roy,
> 
> Thanks for clarifying the dot sizes question.  Is it also necessary  
> to use the highest print resolution to ensure that the smallest dot  
> sizes will be used or is there no relationship between resolution and  
> dot sizes?
> 
> Carl
> 
> On May 29, 2007, at 12:11 AM, Roy Harrington wrote:
> 
> >
> > I've got an R260 that I've started playing with -- I expect the  
> > 1400 is pretty similar.
> > The Epson's touting of 5 drop sizes is a bit of marketing hype  
> > IMO.  It's still a 3 dropsizes
> > at a time printer just like all the other recent printers.   The  
> > difference is that they
> > have more choices in what 3 sizes can be used but you must still  
> > pick the set of 3
> > before any printing.
> >
> > The thing to realize in all cases is that the smallest size  
> > determines the dottiness in
> > the highlights, the largest size times the resolution must be  
> > enough to provide
> > enough ink for dMax.  The old printers always gave you 3 sizes that  
> > were consecutive
> > like 1,2,3 or 2,3,4 the R260 has 1,2,3 or 1,2,4 or 1,3,5 or  
> > 2,3,5.   Does all this make
> > a difference?  It's hard to tell.  I expect low res, fast printing  
> > may benefit but for the
> > best high res printing it's probably a toss up.
> >
> > I think one of the advantages of Paul's multi-eboni approach is  
> > that he can keep the
> > ink limits of the individual channels low enough to stay in the  
> > small dot range but
> > still get to dMax because he has multiple channels firing.
> >
> > Roy
> >
> >
> > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Carl Schofield  
> > <list@> wrote:
> >>
> >> Paul,
> >>
> >> Do you know what the dot size distribution is across the tonal scale
> >> for these "1.5 pl" printers?  Epson describes the new printers, not
> >> as 1.5 pl printers, but rather Dx5 variable drop size.  I'd assume
> >> that the smallest drop size (1.5pl) is used only in the highlights,
> >> but I don't really know that.  Here is Epson's blurb:
> >> "With DX5 (droplets x 5 sizes), each nozzle has advanced capabilities
> >> to discern and adjust the ink droplet size based on the needs of your
> >> print job."
> >>
> >> Can you look at a 21 step printed grayscale and actually see
> >> different drop sizes on the print?  Could also be resolution
> >> dependent where smallest drop sizes are only used at highest printing
> >> resolution.
> >>
> >> Carl
> >>
> >> On May 28, 2007, at 3:24 PM, Paul Roark wrote:
> >>
> >>> Hi Myron,
> >>>
> >>>> For purely B&W printing using 3rd party B&W inks,
> >>>> is there any advantage to the Epson 1800 over the 1400?
> >>>
> >>> I'm waiting for my 260 to arrive.  I'll let people know as soon as
> >>> I can get
> >>> it running with my new approach.  Hopefully, I'll have the multi-
> >>> channel
> >>> Eboni approach running in that under $100 printer soon.
> >>>
> >>>> Both have 1.5 picolitre jets, and both will handle 13" paper.
> >>>> The 1800 has eight heads, while the 1400 has six, but this
> >>>> should not be an issue with B&W.
> >>>
> >>> Yes, 3 channels appears to be all that are needed.
> >>>
> >>>> Will QTR work with the 1400?
> >>>
> >>> I expect QTR support is not too far off.  Also, I think I can set
> >>> up an
> >>> Epson driver workflow with the 260/1400.
> >>>
> >>>> Aside from that, is there any reason I
> >>>> should not save the $150-$200 and get the 1400?
> >>>
> >>> The relative build quality and paper handling will be issues I'll
> >>> be looking
> >>> at.  One the one hand the 1400 is a second generation 1.5 pl
> >>> machine, so
> >>> Epson may actually have learned a few lessons that will allow it to
> >>> improve
> >>> the printing.  On the other hand, it's cheaper.  Some of the cheaper
> >>> printers show it.
> >>>
> >>> Paul
> >>> www.PaulRoark.com
> >>
>

Re: [Digital BW] Epson 1400 vs 1800

2007-05-30 by Ernst Dinkla

Roy Harrington wrote:
> Duane,
> 
> The set of dotsizes applies for all the channels on a page, so there is no variation
> per channel.  I really don't think you'd find much benefit messing around with
> lots of different dotsizes.
> 
> Roy

On the HP Z3100 models there are just two droplet sizes 
available: 4 and 6 picoliter. Some heads like the MK head 
and the GE + some light inks only squirt 6 picoliter 
droplets, the PK head only 4 ml. In that case the little 
variation is on the channels. Per channel there are about 
1000 nozzles and a high firing rate so compensation enough 
for less droplet sizes. In that sense not unlike the three 
heads BO that Paul uses.

What is the nozzle quantity of the 1400 heads compared to 
the 1800 heads? Are they the same ?


Met vriendelijke groeten, Ernst


|  Dinkla Grafische Techniek  |
|     www.pigment-print.com    |
|             ( unvollendet )            |

Re: [Digital BW] Epson 1400 vs 1800

2007-05-30 by Olivier

> 
> On the HP Z3100 models there are just two droplet sizes 
> available: 4 and 6 picoliter. 

Ernst, I remember once you mentionned dot gain is "proportionally" 
higher with small dots than larger ones. My memory is not always 
correct, can you please confirm.
Sorry I disturb this discussion, but I wanted to try my luck ...
Thanks.
Olivier

Re: [Digital BW] Epson 1400 vs 1800

2007-05-30 by dlruckus

Thanks Roy. I guess I worded that badly. What I had in mind actually
was fixing the dot size at only one, usually the smallest, as an
option, rather than a set. Then would make up for lesser dot coverage
with multiple channels of K to get d'max and fill in. Am I wrong in
assuming that one could then put maximum ink down with 100% limits for
papers that soak it up, like uncoated ones, while still limiting other
channels and partitioning across the scale? Or would the mechanical
aspects of that smaller dot end up being the equivalent of reducing
limits anyway and counteract the effect?

Regards
Duane



--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
<roy@...> wrote:
>
> 
> Duane,
> 
> The set of dotsizes applies for all the channels on a page, so there
is no variation
> per channel.  I really don't think you'd find much benefit messing
around with
> lots of different dotsizes.
> 
> Roy
> 
> --- In DigitalBlackandWhiteThePrint@...m, "dlruckus"
<dlruckus@> 
Show quoted textHide quoted text
> wrote:
> >
> > Hi Roy.
> > Any chance selectable dot size per channel could be used with QTR in
> > that context? I've often thought that utilizing the multi BO concept
> > Paul is working with here could quite possibly be of use with uncoated
> > art papers. Perhaps a 2K approach could even be used with some of the
> > older machines.
> > 
> > Regards
> > Duane
> > 
> > 
> > 
> > 
> > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
> > <roy@> wrote:
> > >
> > > 
> > > I think one of the advantages of Paul's multi-eboni approach is that
> > he can keep the
> > > ink limits of the individual channels low enough to stay in the
> > small dot range but
> > > still get to dMax because he has multiple channels firing.
> > > 
> > > Roy
> > >
> >
>

Re: [Digital BW] Epson 1400 vs 1800

2007-05-30 by Roy Harrington

I not sure I follow you exactly but I think what you want is already the way it works.
You always use the small dots first anyway so if you keep the amount of ink low i.e.
with low ink limits you will only use small dots.   In other words 3 channels of
ink limit 25 is the same as 1 channel of ink limit 75 for how much ink is output.  But
its likely that you'll be using mostly small dots instead of the whole set of dots.

Roy

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dlruckus" <dlruckus@...> wrote:
Show quoted textHide quoted text
>
> Thanks Roy. I guess I worded that badly. What I had in mind actually
> was fixing the dot size at only one, usually the smallest, as an
> option, rather than a set. Then would make up for lesser dot coverage
> with multiple channels of K to get d'max and fill in. Am I wrong in
> assuming that one could then put maximum ink down with 100% limits for
> papers that soak it up, like uncoated ones, while still limiting other
> channels and partitioning across the scale? Or would the mechanical
> aspects of that smaller dot end up being the equivalent of reducing
> limits anyway and counteract the effect?
> 
> Regards
> Duane
> 
> 
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
> <roy@> wrote:
> >
> > 
> > Duane,
> > 
> > The set of dotsizes applies for all the channels on a page, so there
> is no variation
> > per channel.  I really don't think you'd find much benefit messing
> around with
> > lots of different dotsizes.
> > 
> > Roy
> > 
> > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dlruckus"
> <dlruckus@> 
> > wrote:
> > >
> > > Hi Roy.
> > > Any chance selectable dot size per channel could be used with QTR in
> > > that context? I've often thought that utilizing the multi BO concept
> > > Paul is working with here could quite possibly be of use with uncoated
> > > art papers. Perhaps a 2K approach could even be used with some of the
> > > older machines.
> > > 
> > > Regards
> > > Duane
> > > 
> > > 
> > > 
> > > 
> > > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
> > > <roy@> wrote:
> > > >
> > > > 
> > > > I think one of the advantages of Paul's multi-eboni approach is that
> > > he can keep the
> > > > ink limits of the individual channels low enough to stay in the
> > > small dot range but
> > > > still get to dMax because he has multiple channels firing.
> > > > 
> > > > Roy
> > > >
> > >
> >
>

Re: [Digital BW] Epson 1400 vs 1800

2007-05-30 by Tyler Boley

Roy, something I've been wondering about, and perhaps you know- Do the
dots have blended transitional areas? In other words, when increasing
density requires going to the next larger dot size, will there be a
blend of both dot sizes during the transition?
Not an earth shaking question, but have been wondering.
Imagine a channel limit that was set so that it ended at only 10% or
so of say, the medium dot. So would there be considerable remaining
small dot component?
Tyler

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
<roy@...> wrote:
>
> 
> I not sure I follow you exactly but I think what you want is already
the way it works.
> You always use the small dots first anyway so if you keep the amount
of ink low i.e.
> with low ink limits you will only use small dots.   In other words 3
channels of
> ink limit 25 is the same as 1 channel of ink limit 75 for how much
ink is output.  But
> its likely that you'll be using mostly small dots instead of the
whole set of dots.
> 
> Roy
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dlruckus"
<dlruckus@> wrote:
> >
> > Thanks Roy. I guess I worded that badly. What I had in mind actually
> > was fixing the dot size at only one, usually the smallest, as an
> > option, rather than a set. Then would make up for lesser dot coverage
> > with multiple channels of K to get d'max and fill in. Am I wrong in
> > assuming that one could then put maximum ink down with 100% limits for
> > papers that soak it up, like uncoated ones, while still limiting other
> > channels and partitioning across the scale? Or would the mechanical
> > aspects of that smaller dot end up being the equivalent of reducing
> > limits anyway and counteract the effect?
> > 
> > Regards
> > Duane
> > 
> > 
> > 
> > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
> > <roy@> wrote:
> > >
> > > 
> > > Duane,
> > > 
> > > The set of dotsizes applies for all the channels on a page, so there
> > is no variation
> > > per channel.  I really don't think you'd find much benefit messing
> > around with
> > > lots of different dotsizes.
> > > 
> > > Roy
> > > 
> > > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dlruckus"
> > <dlruckus@> 
> > > wrote:
> > > >
> > > > Hi Roy.
> > > > Any chance selectable dot size per channel could be used with
QTR in
> > > > that context? I've often thought that utilizing the multi BO
concept
> > > > Paul is working with here could quite possibly be of use with
uncoated
> > > > art papers. Perhaps a 2K approach could even be used with some
of the
> > > > older machines.
> > > > 
> > > > Regards
> > > > Duane
> > > > 
> > > > 
> > > > 
> > > > 
> > > > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy
Harrington"
> > > > <roy@> wrote:
> > > > >
> > > > > 
> > > > > I think one of the advantages of Paul's multi-eboni approach
is that
Show quoted textHide quoted text
> > > > he can keep the
> > > > > ink limits of the individual channels low enough to stay in the
> > > > small dot range but
> > > > > still get to dMax because he has multiple channels firing.
> > > > > 
> > > > > Roy
> > > > >
> > > >
> > >
> >
>

Re: [Digital BW] Epson 1400 vs 1800

2007-05-30 by Roy Harrington

Hi Tyler,

Yes, the transistions between dot sizes are blended -- much like the
transitions between partitioned inks.  Every kind of transition has to be gradual
to make it invisible.

Roy

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Tyler Boley" <tyler@...> 
wrote:
Show quoted textHide quoted text
>
> Roy, something I've been wondering about, and perhaps you know- Do the
> dots have blended transitional areas? In other words, when increasing
> density requires going to the next larger dot size, will there be a
> blend of both dot sizes during the transition?
> Not an earth shaking question, but have been wondering.
> Imagine a channel limit that was set so that it ended at only 10% or
> so of say, the medium dot. So would there be considerable remaining
> small dot component?
> Tyler
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
> <roy@> wrote:
> >
> > 
> > I not sure I follow you exactly but I think what you want is already
> the way it works.
> > You always use the small dots first anyway so if you keep the amount
> of ink low i.e.
> > with low ink limits you will only use small dots.   In other words 3
> channels of
> > ink limit 25 is the same as 1 channel of ink limit 75 for how much
> ink is output.  But
> > its likely that you'll be using mostly small dots instead of the
> whole set of dots.
> > 
> > Roy
> > 
> > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dlruckus"
> <dlruckus@> wrote:
> > >
> > > Thanks Roy. I guess I worded that badly. What I had in mind actually
> > > was fixing the dot size at only one, usually the smallest, as an
> > > option, rather than a set. Then would make up for lesser dot coverage
> > > with multiple channels of K to get d'max and fill in. Am I wrong in
> > > assuming that one could then put maximum ink down with 100% limits for
> > > papers that soak it up, like uncoated ones, while still limiting other
> > > channels and partitioning across the scale? Or would the mechanical
> > > aspects of that smaller dot end up being the equivalent of reducing
> > > limits anyway and counteract the effect?
> > > 
> > > Regards
> > > Duane
> > > 
> > > 
> > > 
> > > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
> > > <roy@> wrote:
> > > >
> > > > 
> > > > Duane,
> > > > 
> > > > The set of dotsizes applies for all the channels on a page, so there
> > > is no variation
> > > > per channel.  I really don't think you'd find much benefit messing
> > > around with
> > > > lots of different dotsizes.
> > > > 
> > > > Roy
> > > > 
> > > > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dlruckus"
> > > <dlruckus@> 
> > > > wrote:
> > > > >
> > > > > Hi Roy.
> > > > > Any chance selectable dot size per channel could be used with
> QTR in
> > > > > that context? I've often thought that utilizing the multi BO
> concept
> > > > > Paul is working with here could quite possibly be of use with
> uncoated
> > > > > art papers. Perhaps a 2K approach could even be used with some
> of the
> > > > > older machines.
> > > > > 
> > > > > Regards
> > > > > Duane
> > > > > 
> > > > > 
> > > > > 
> > > > > 
> > > > > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy
> Harrington"
> > > > > <roy@> wrote:
> > > > > >
> > > > > > 
> > > > > > I think one of the advantages of Paul's multi-eboni approach
> is that
> > > > > he can keep the
> > > > > > ink limits of the individual channels low enough to stay in the
> > > > > small dot range but
> > > > > > still get to dMax because he has multiple channels firing.
> > > > > > 
> > > > > > Roy
> > > > > >
> > > > >
> > > >
> > >
> >
>

Re: [Digital BW] Epson 1400 vs 1800

2007-05-30 by Tyler Boley

Thanks Roy. It makes sense of course, and I thought that would be the
case. It does somehow make the issue of coverage, or how it is
neasured, or dot area, or dot percent etc. as a per color spec seem
confused a bit.
Not quite sure how to put what I mean, or if it matters to anyone on
the planet... but a "small" percent number of a color could actually
be 100% small dot, and transitional areas would be odd to quantize in
terms of coverage as well....
On a related note, with all of these light ink printers now, the whole
traditional concept of a total ink spec has become very confused.
Hell, maybe making a dinner choice would be more productive than
musing on this...
Thanks Roy,
Tyler

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
<roy@...> wrote:
>
> Hi Tyler,
> 
> Yes, the transistions between dot sizes are blended -- much like the
> transitions between partitioned inks.  Every kind of transition has
to be gradual
> to make it invisible.
> 
> Roy
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Tyler Boley"
<tyler@> 
Show quoted textHide quoted text
> wrote:
> >
> > Roy, something I've been wondering about, and perhaps you know- Do the
> > dots have blended transitional areas?

Re: Epson 1400 vs 1800

2007-05-31 by dlruckus

Yes. Thanks again. I think I see what you are saying and it would
effectively be the same. I was looking for a way to have some control,
however slight, over the dottiness factor with BO as well as achieving
an enhanced d'max with uncoated papers. It's apparent that I still
have a long way to go in learning the intricacies of a rip and it's use.

Regards
Duane


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
<roy@...> wrote:
>
> 
> I not sure I follow you exactly but I think what you want is already
the way it works.
> You always use the small dots first anyway so if you keep the amount
of ink low i.e.
> with low ink limits you will only use small dots.   In other words 3
channels of
> ink limit 25 is the same as 1 channel of ink limit 75 for how much
ink is output.  But
> its likely that you'll be using mostly small dots instead of the
whole set of dots.
> 
> Roy
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dlruckus"
<dlruckus@> wrote:
> >
> > Thanks Roy. I guess I worded that badly. What I had in mind actually
> > was fixing the dot size at only one, usually the smallest, as an
> > option, rather than a set. Then would make up for lesser dot coverage
> > with multiple channels of K to get d'max and fill in. Am I wrong in
> > assuming that one could then put maximum ink down with 100% limits for
> > papers that soak it up, like uncoated ones, while still limiting other
> > channels and partitioning across the scale? Or would the mechanical
> > aspects of that smaller dot end up being the equivalent of reducing
> > limits anyway and counteract the effect?
> > 
> > Regards
> > Duane
> > 
> > 
> > 
> > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
> > <roy@> wrote:
> > >
> > > 
> > > Duane,
> > > 
> > > The set of dotsizes applies for all the channels on a page, so there
> > is no variation
> > > per channel.  I really don't think you'd find much benefit messing
> > around with
> > > lots of different dotsizes.
> > > 
> > > Roy
> > > 
> > > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dlruckus"
> > <dlruckus@> 
> > > wrote:
> > > >
> > > > Hi Roy.
> > > > Any chance selectable dot size per channel could be used with
QTR in
> > > > that context? I've often thought that utilizing the multi BO
concept
> > > > Paul is working with here could quite possibly be of use with
uncoated
> > > > art papers. Perhaps a 2K approach could even be used with some
of the
> > > > older machines.
> > > > 
> > > > Regards
> > > > Duane
> > > > 
> > > > 
> > > > 
> > > > 
> > > > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy
Harrington"
> > > > <roy@> wrote:
> > > > >
> > > > > 
> > > > > I think one of the advantages of Paul's multi-eboni approach
is that
Show quoted textHide quoted text
> > > > he can keep the
> > > > > ink limits of the individual channels low enough to stay in the
> > > > small dot range but
> > > > > still get to dMax because he has multiple channels firing.
> > > > > 
> > > > > Roy
> > > > >
> > > >
> > >
> >
>

Re: Epson 1400 vs 1800

2007-05-31 by Tyler Boley

if you are trying to insure the smallest dot sizes are used with the tightest patters, can't 
you just select 2880, or whatever the highest res setting your printer offers?
Tyler

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dlruckus" <dlruckus@...> wrote:
Show quoted textHide quoted text
>
> Yes. Thanks again. I think I see what you are saying and it would
> effectively be the same. I was looking for a way to have some control,
> however slight, over the dottiness factor with BO as well as achieving
> an enhanced d'max with uncoated papers. It's apparent that I still
> have a long way to go in learning the intricacies of a rip and it's use.
> 
> Regards
> Duane
> 
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
> <roy@> wrote:
> >
> > 
> > I not sure I follow you exactly but I think what you want is already
> the way it works.
> > You always use the small dots first anyway so if you keep the amount
> of ink low i.e.
> > with low ink limits you will only use small dots.   In other words 3
> channels of
> > ink limit 25 is the same as 1 channel of ink limit 75 for how much
> ink is output.  But
> > its likely that you'll be using mostly small dots instead of the
> whole set of dots.
> > 
> > Roy
> > 
> > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dlruckus"
> <dlruckus@> wrote:
> > >
> > > Thanks Roy. I guess I worded that badly. What I had in mind actually
> > > was fixing the dot size at only one, usually the smallest, as an
> > > option, rather than a set. Then would make up for lesser dot coverage
> > > with multiple channels of K to get d'max and fill in. Am I wrong in
> > > assuming that one could then put maximum ink down with 100% limits for
> > > papers that soak it up, like uncoated ones, while still limiting other
> > > channels and partitioning across the scale? Or would the mechanical
> > > aspects of that smaller dot end up being the equivalent of reducing
> > > limits anyway and counteract the effect?
> > > 
> > > Regards
> > > Duane
> > > 
> > >

Re: Epson 1400 vs 1800

2007-05-31 by dlruckus

Hi Tyler. My printers are a 3000,a 1200 and a 7000. The 1200 is
variable dot. The others are not. It's my understanding (perhaps
warped but all I have to work with;) )that the dot size shifts with
ink limits in QTR. What I was asking was if the dot size could be
fixed at the smallest for an entire document regardless of ink limits.
I think Roy told me that could happen only with reduced limits. Maybe
you are correct and at the highest res that is what happens anyway. I
seem to recall reading somewhere that it does in regard to the 2880dpi
machines and the 1800. I don't know if that is the case with my older
machines.
 It's only really of interest to me in relation to using uncoated
papers(yes,I know--but see my reference to understanding above) where
I was considering that perhaps Paul's experiments could be
extrapolated into a means of gaining hi(relatively) density shadows
while still achieving a bit more smoothness within a BO workflow.
Considering what Roy said, it looks as if that might work out anyhow
and I can just try using multiple channels of black overlaid for the
bottom, at full bore, while limiting a couple more for mids to get
minimum dots and so on.
 If anyone would know if that could work out, it would be you, as I
understand you flagellate yourself with Rip texts as a means of
approaching Nirvana in this life :).
 With a paper such as the old Somerset Velvet and using Eboni which
seems to me to be a bit stiffer than other inks I have any experience
with, the old 1200 makes pretty fair BO prints as it is for some
images. With just a shade more help they might be considerably better
than just pretty fair. That, of course, might be very arguable for an
old hand with large format like yourself.

Regards
Duane




--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Tyler Boley"
<tyler@...> wrote:
>
> if you are trying to insure the smallest dot sizes are used with the
tightest patters, can't 
> you just select 2880, or whatever the highest res setting your
printer offers?
> Tyler
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dlruckus"
<dlruckus@> wrote:
> >
> > Yes. Thanks again. I think I see what you are saying and it would
> > effectively be the same. I was looking for a way to have some control,
> > however slight, over the dottiness factor with BO as well as achieving
> > an enhanced d'max with uncoated papers. It's apparent that I still
> > have a long way to go in learning the intricacies of a rip and
it's use.
Show quoted textHide quoted text
> > 
> > Regards
> > Duane
> > 
> >

Re: Epson 1400 vs 1800

2007-05-31 by Tyler Boley

Daune, here's what I strongly suspect, not what I know...
Since I've been doing this so long I actually have some uncoated mono
Somerset prints around here somewhere (and they were beautiful in a
delicate sort of way) and have indeed played with dot size a lot, this
 MAY be useful.
I hope Roy answers though as QTR behavior and driver/printer behavior
is going to be more his area then mine.
I think your non variable printers are still selectable, in that
different quality settings may use different dots sizes, just not more
than one at once. Somewhere on this list long ago Roy explained that
to me.
Anyway, the 1200- if variable the dots size shifts with limits in the
sense that a severe limit will not allow the printer to go up to the
next size, sounds like you got that. However, if limited to the
smallest dot, it will not get to the same density at 1440 as it will
at 2880, because the small dot is too widely spaced. That's why at
1440 more sizes are necessary and available, and in my RIP, variable
dot, and sizes other than the smallest, are not selectable at 2880.
That's why I suggested 2880, if QTR works like my RIP, 2880 will allow
only the smallest dot for the entire doc, and with all inks, and still
allow max coverage if you want it.
What I don't know at all is if any of that is relevant to your 1200.
If you want to insure small dot only, and there is no dpi setting, or
any other setting, that lets you do that, you're back to your limit
question for Roy and I'm just blowing smoke.
Also possibly of interest to you, I suspect achieving good density
with no bleed will be one of your challenges. I think, at least with
one ink, you could get slightly higher density before bleed with
smaller dots than larger. However, with multiple inks, the reverse may
be true...
Yes, I've been attempting to turn the art of applying ink to paper
into some sort of mysticism, I'm beginning to suspect it's a
shockingly flawed concept for which I will pay dearly...
Tyler


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dlruckus"
<dlruckus@...> wrote:
>
> Hi Tyler. My printers are a 3000,a 1200 and a 7000. The 1200 is
> variable dot. The others are not. It's my understanding (perhaps
> warped but all I have to work with;) )that the dot size shifts with
> ink limits in QTR. What I was asking was if the dot size could be
> fixed at the smallest for an entire document regardless of ink limits.
> I think Roy told me that could happen only with reduced limits. Maybe
> you are correct and at the highest res that is what happens anyway. I
> seem to recall reading somewhere that it does in regard to the 2880dpi
> machines and the 1800. I don't know if that is the case with my older
> machines.
>  It's only really of interest to me in relation to using uncoated
> papers(yes,I know--but see my reference to understanding above) where
> I was considering that perhaps Paul's experiments could be
> extrapolated into a means of gaining hi(relatively) density shadows
> while still achieving a bit more smoothness within a BO workflow.
> Considering what Roy said, it looks as if that might work out anyhow
> and I can just try using multiple channels of black overlaid for the
> bottom, at full bore, while limiting a couple more for mids to get
> minimum dots and so on.
>  If anyone would know if that could work out, it would be you, as I
> understand you flagellate yourself with Rip texts as a means of
> approaching Nirvana in this life :).
>  With a paper such as the old Somerset Velvet and using Eboni which
> seems to me to be a bit stiffer than other inks I have any experience
> with, the old 1200 makes pretty fair BO prints as it is for some
> images. With just a shade more help they might be considerably better
> than just pretty fair. That, of course, might be very arguable for an
> old hand with large format like yourself.
> 
> Regards
> Duane
> 
> 
> 
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Tyler Boley"
> <tyler@> wrote:
> >
> > if you are trying to insure the smallest dot sizes are used with the
> tightest patters, can't 
> > you just select 2880, or whatever the highest res setting your
> printer offers?
> > Tyler
> > 
> > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dlruckus"
> <dlruckus@> wrote:
> > >
> > > Yes. Thanks again. I think I see what you are saying and it would
> > > effectively be the same. I was looking for a way to have some
control,
> > > however slight, over the dottiness factor with BO as well as
achieving
Show quoted textHide quoted text
> > > an enhanced d'max with uncoated papers. It's apparent that I still
> > > have a long way to go in learning the intricacies of a rip and
> it's use.
> > > 
> > > Regards
> > > Duane
> > > 
> > >
>

Re: Epson 1400 vs 1800

2007-06-02 by dlruckus

Thanks for your input Tyler. It's much appreciated. I had thought
about possible bleeding problems also but hoped that using smaller
dots with multiple channels might help in limiting it while still
allowing good d'max. If it is a problem, I'll try the limits thing
with multi channels and see if it works. I have a 2nd 1200 that will
be a good candidate for multi black experiments as one channel has a
couple of nozzle drop outs I can't get rid of, so would just use 5
channels of black.
I remember the thread you are referring to and may have some of it
filed somewhere on one of my systems. I tend to do that when there's
info that seems pertinent to my machines.

Best regards
Duane


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Tyler Boley"
<tyler@...> wrote:
Show quoted textHide quoted text
>
> Daune, here's what I strongly suspect, not what I know...
> Since I've been doing this so long I actually have some uncoated mono
> Somerset prints around here somewhere (and they were beautiful in a
> delicate sort of way) and have indeed played with dot size a lot, this
>  MAY be useful.
> I hope Roy answers though as QTR behavior and driver/printer behavior
> is going to be more his area then mine.
> I think your non variable printers are still selectable, in that
> different quality settings may use different dots sizes, just not more
> than one at once. Somewhere on this list long ago Roy explained that
> to me.
> Anyway, the 1200- if variable the dots size shifts with limits in the
> sense that a severe limit will not allow the printer to go up to the
> next size, sounds like you got that. However, if limited to the
> smallest dot, it will not get to the same density at 1440 as it will
> at 2880, because the small dot is too widely spaced. That's why at
> 1440 more sizes are necessary and available, and in my RIP, variable
> dot, and sizes other than the smallest, are not selectable at 2880.
> That's why I suggested 2880, if QTR works like my RIP, 2880 will allow
> only the smallest dot for the entire doc, and with all inks, and still
> allow max coverage if you want it.
> What I don't know at all is if any of that is relevant to your 1200.
> If you want to insure small dot only, and there is no dpi setting, or
> any other setting, that lets you do that, you're back to your limit
> question for Roy and I'm just blowing smoke.
> Also possibly of interest to you, I suspect achieving good density
> with no bleed will be one of your challenges. I think, at least with
> one ink, you could get slightly higher density before bleed with
> smaller dots than larger. However, with multiple inks, the reverse may
> be true...
> Yes, I've been attempting to turn the art of applying ink to paper
> into some sort of mysticism, I'm beginning to suspect it's a
> shockingly flawed concept for which I will pay dearly...
> Tyler
> 
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dlruckus"
> <dlruckus@> wrote:
> >
> > Hi Tyler. My printers are a 3000,a 1200 and a 7000. The 1200 is
> > variable dot. The others are not. It's my understanding (perhaps
> > warped but all I have to work with;) )that the dot size shifts with
> > ink limits in QTR. What I was asking was if the dot size could be
> > fixed at the smallest for an entire document regardless of ink limits.
> > I think Roy told me that could happen only with reduced limits. Maybe
> > you are correct and at the highest res that is what happens anyway. I
> > seem to recall reading somewhere that it does in regard to the 2880dpi
> > machines and the 1800. I don't know if that is the case with my older
> > machines.
> >  It's only really of interest to me in relation to using uncoated
> > papers(yes,I know--but see my reference to understanding above) where
> > I was considering that perhaps Paul's experiments could be
> > extrapolated into a means of gaining hi(relatively) density shadows
> > while still achieving a bit more smoothness within a BO workflow.
> > Considering what Roy said, it looks as if that might work out anyhow
> > and I can just try using multiple channels of black overlaid for the
> > bottom, at full bore, while limiting a couple more for mids to get
> > minimum dots and so on.
> >  If anyone would know if that could work out, it would be you, as I
> > understand you flagellate yourself with Rip texts as a means of
> > approaching Nirvana in this life :).
> >  With a paper such as the old Somerset Velvet and using Eboni which
> > seems to me to be a bit stiffer than other inks I have any experience
> > with, the old 1200 makes pretty fair BO prints as it is for some
> > images. With just a shade more help they might be considerably better
> > than just pretty fair. That, of course, might be very arguable for an
> > old hand with large format like yourself.
> > 
> > Regards
> > Duane
> > 
> > 
> > 
> >

Re: [Digital BW] Epson 1400 vs 1800

2007-06-02 by Ernst Dinkla

Olivier wrote:
>> On the HP Z3100 models there are just two droplet sizes 
>> available: 4 and 6 picoliter. 
> 
> Ernst, I remember once you mentionned dot gain is "proportionally" 
> higher with small dots than larger ones. My memory is not always 
> correct, can you please confirm.
> Sorry I disturb this discussion, but I wanted to try my luck ...
> Thanks.
> Olivier

This is correct. If there's dotgain as a result of slower 
drying, higher printing  speed, etc then the dotgain will be 
more pronounced with smaller dots than with larger dots for 
the same tone. The boundary of the dot is where the dotgain 
happens, 40 small dots at 30% coverage have a longer total 
boundary than 20 bigger dots at 30%.

This effect is in itself also more pronounced with a high 
contrast black ink with opacity where the dotgain will be 
opaque as well. With the diluted grey inks that have some 
transparency the dotgain will be more transparent + where 
the ink flows from in the dot the dot may get less density. 
Black dots have more buffer so dotgain has more impact with 
black. In detail reproduction both cases are wrong but with 
black dots you also get more pronounced tone shifts.

Met vriendelijke groeten,  Ernst


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