Digital BW, The Print

Group,

Just to let you know:
As an BO printer (2100+ MK and Eboni) on art paper who was evaluating 
his prints, I noticed a slight irregularity in the lighter grey areas 
(40% and less). The longer I looked, the more irritated I become.
I did some testing with printing a step wedge, and learned that using 
the Epson watercolor-radiant profile (that was my default) caused 
irregulair and ugly dot patterns in the lighter areas. 
When I use the EEM profile, I get smooth dot patterns. I now switched 
to EEM profile after some dot gain tweaking. 

But then I read the memo of Clayton in which he mentioned "tiny 
double dots" when printing with thick paper through the back feed.
I realy want to understand this effect so I can reproduce it. Is it 
profile based ?
Because with my 1290 I also experianced this effect, but never knew 
where it came from and assumed that it was a temporarely failure of 
the printhead. I am that curious, because I liked this dot pattern 
because of its smoothness in the lighter areas. 

Another question: I have found some additional Epson paper profiles 
on the australian Epson site which are not standard installed (?) 
with my 2100 software. Where do I have to place them so my printer 
software will find it ?

Best regards,
http://home.wanadoo.nl/rene.r.bakker/

Hello Gretha,

>I did some testing with printing a step wedge, and learned that 
>using the Epson watercolor-radiant profile (that was my default) 
>caused irregulair and ugly dot patterns in the lighter areas. 
>When I use the EEM profile, I get smooth dot patterns. I now 
>switched to EEM profile after some dot gain tweaking. 
> 
>But then I read the memo of Clayton in which he mentioned "tiny 
>double dots" when printing with thick paper through the back feed.
>I realy want to understand this effect so I can reproduce it. Is 
>it profile based ?

No, in my case it is not - I don't use paper profiles.  My techniques
are described in articles # 3 and 4 on the web link below.

As for the double dots, I don't notice much if any difference in the
over all look of the print.  It's only noticible with a loupe.


Regards,
Clayton


Info on black and white digital printing at    
http://www.cjcom.net/digiprnarts.htm

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Clayton Jones" <cj@c...> 
wrote:
> Hello Gretha,
> 
> >I did some testing with printing a step wedge, and learned that 
> >using the Epson watercolor-radiant profile (that was my default) 
> >caused irregulair and ugly dot patterns in the lighter areas. 
> >When I use the EEM profile, I get smooth dot patterns. I now 
> >switched to EEM profile after some dot gain tweaking. 
> > 
> >But then I read the memo of Clayton in which he mentioned "tiny 
> >double dots" when printing with thick paper through the back feed.
> >I realy want to understand this effect so I can reproduce it. Is 
> >it profile based ?
> 
> No, in my case it is not - I don't use paper profiles.  My techniques
> are described in articles # 3 and 4 on the web link below.
> 
> As for the double dots, I don't notice much if any difference in the
> over all look of the print.  It's only noticible with a loupe.
> 
> 
> Regards,
> Clayton
> 
> 
> Info on black and white digital printing at    
> http://www.cjcom.net/digiprnarts.htm

Those double dots are weird.  It's been a while but I'm pretty I had
the same thing on my 1160 with the Epson driver.

Roy

Hello Roy,

>Those double dots are weird.  It's been a while but I'm pretty I had
>the same thing on my 1160 with the Epson driver.

My 870 used double dots.  I took it for granted until I got the 2200
and realized it didn't have to be.  Now here they are again on manual
feed prints.  Perhaps it uses a pair of smallest possible dots instead
on one larger one to lessen dot gain on thick papers which might be
uncoated...

I got them one other time, during experiments last year with chips and
carts.  I can't remember exactly what it was, either putting Museum
Black in an Epson MK cart or putting a PK chip on an Eboni
cart...something like that.  Doesn't seem to be a problem.


Regards,
Clayton


Info on black and white digital printing at    
http://www.cjcom.net/digiprnarts.htm