Digital BW, The Print

scrber [stephen.bate@...] wrote:

>... MIS VM hextone set for the Epson 1290 (with Paul's new curves).
>... printed the 21 step wedge on EAM and have found the following:

>cool : Nicely separated, seems very even and just what I'd expect.

>NC : as above

>Warm : yikes.  There is a huge separation between the 75 and 80
>steps,...

That is where the steep toner curve starts.  Other 1290s seem to handle it
well.  So, your machine might be slightly off or something in your settings
may be different.  Before, tweaking the curve, I'd re-check the settings.

> There are no smooth graduations between midtones (all of
>which seem extremely light) and the shadows - for sure this is not a
>smooth ramp.

Now it is sounding like the cyan (main midtone) was missing.  Be sure to do
a nozzle check.  However, if the cyan ink(s) are not firing right, none of
the curves would print well.

I'd check the rest of the system before tweaking any curves.  Also, I'll
send you curves off list just in case the warm curve that MIS posted is
corrupted.


Paul
http://www.PaulRoark.com

Hallo,

Ones I forgot to Grayscale--->RGB before choosing the w1-curve.
I remember the same stepwedge as you. Could you have forgotten that?

?
Bo

 

--- In DigitalBlackandWhiteThePrint@y..., "Paul Roark" 
<paul.roark@v...> wrote:
> scrber [stephen.bate@m...] wrote:
> 
> >... MIS VM hextone set for the Epson 1290 (with Paul's new curves).
> >... printed the 21 step wedge on EAM and have found the following:
> 
> >cool : Nicely separated, seems very even and just what I'd expect.
> 
> >NC : as above
> 
> >Warm : yikes.  There is a huge separation between the 75 and 80
> >steps,...
> 
> That is where the steep toner curve starts.  Other 1290s seem to 
handle it
> well.  So, your machine might be slightly off or something in your 
settings
> may be different.  Before, tweaking the curve, I'd re-check the 
settings.
> 
> > There are no smooth graduations between midtones (all of
> >which seem extremely light) and the shadows - for sure this is not 
a
> >smooth ramp.
> 
> Now it is sounding like the cyan (main midtone) was missing.  Be 
sure to do
> a nozzle check.  However, if the cyan ink(s) are not firing right, 
none of
> the curves would print well.
> 
> I'd check the rest of the system before tweaking any curves.  Also, 
I'll
> send you curves off list just in case the warm curve that MIS 
posted is

> corrupted.
> 
> 
> Paul
> http://www.PaulRoark.com

Hallo,

Paul and others,

The 1290 VM-(old) works all of them for me. 
Only I think the VM_gs1-curve is to steep in 100 to ~70% - (the curve 
for grayscale printing) so I use the VM-nc1 curve instead. 
For me all the RGB curves are ok! Very good indeed! That is VM-c1,-nc 
and - w1! The -gs1 you might like if you like darker shadows with the 
highlights as usual.

Fiat Lux!
Bo
 

--- In DigitalBlackandWhiteThePrint@y..., "Bo Wrangborg" 
<sm7bxd@y...> wrote:
> Hallo,
> 
> Ones I forgot to Grayscale--->RGB before choosing the w1-curve.
> I remember the same stepwedge as you. Could you have forgotten that?
> 
> ?
> Bo
> 
>  
> 
> --- In DigitalBlackandWhiteThePrint@y..., "Paul Roark" 
> <paul.roark@v...> wrote:
> > scrber [stephen.bate@m...] wrote:
> > 
> > >... MIS VM hextone set for the Epson 1290 (with Paul's new 
curves).
> > >... printed the 21 step wedge on EAM and have found the 
following:
> > 
> > >cool : Nicely separated, seems very even and just what I'd 
expect.
> > 
> > >NC : as above
> > 
> > >Warm : yikes.  There is a huge separation between the 75 and 80
> > >steps,...
> > 
> > That is where the steep toner curve starts.  Other 1290s seem to 
> handle it
> > well.  So, your machine might be slightly off or something in 
your 
> settings
> > may be different.  Before, tweaking the curve, I'd re-check the 
> settings.
> > 
> > > There are no smooth graduations between midtones (all of
> > >which seem extremely light) and the shadows - for sure this is 
not 
> a
> > >smooth ramp.
> > 
> > Now it is sounding like the cyan (main midtone) was missing.  Be 
> sure to do
> > a nozzle check.  However, if the cyan ink(s) are not firing 
right, 
> none of
> > the curves would print well.
> > 
> > I'd check the rest of the system before tweaking any curves.  
Also, 

> I'll
> > send you curves off list just in case the warm curve that MIS 
> posted is
> > corrupted.
> > 
> > 
> > Paul
> > http://www.PaulRoark.com

--- In DigitalBlackandWhiteThePrint@y..., "Paul Roark" 
<paul.roark@v...> wrote:
> scrber [stephen.bate@m...] wrote:


Hi Paul, thanks for the feedback.

I double checked everything - everything seems fine.

All wedges were printed at the same time on one page, each as a 
different layer with the various curves applied so I agree that 
there can't be much off with the settings.

I really don't know what I am doing with the partioning of curves 
but I did play around with the green channel and yellow channel a 
little (for interest, after the warm curve is applied the images 
that have a great deal of tonal range in greyscale seem almost 
totally green - ie, very little partioning, I guess this would lead 
to a very flat print as it is only calling off one 'ink colour' from 
the hextone set right?)
Anyway, my tweaked curve gave a huge improvement - I know it won't 
be balanced or have the correct densities or anything but it did 
show me that the printer should be OK.  

As I say, the other work fine.  

I'll try your re-sent curve on Monday..

Thanks

Steve.












> >... MIS VM hextone set for the Epson 1290 (with Paul's new 
curves).
> >... printed the 21 step wedge on EAM and have found the following:
> 
> >cool : Nicely separated, seems very even and just what I'd expect.
> 
> >NC : as above
> 
> >Warm : yikes.  There is a huge separation between the 75 and 80
> >steps,...
> 
> That is where the steep toner curve starts.  Other 1290s seem to 
handle it
> well.  So, your machine might be slightly off or something in your 
settings
> may be different.  Before, tweaking the curve, I'd re-check the 
settings.
> 
> > There are no smooth graduations between midtones (all of
> >which seem extremely light) and the shadows - for sure this is 
not a
> >smooth ramp.
> 
> Now it is sounding like the cyan (main midtone) was missing.  Be 
sure to do
> a nozzle check.  However, if the cyan ink(s) are not firing right, 
none of
> the curves would print well.
> 
> I'd check the rest of the system before tweaking any curves.  
Also, I'll
> send you curves off list just in case the warm curve that MIS 
posted is

> corrupted.
> 
> 
> Paul
> http://www.PaulRoark.com