Digital BW, The Print

Hello all,

I have two Epson 1280 printers and when I print the same image using 
the same ink (Eboni) the results are decidedly different. With the 
older printer the blacks are about one Zone lighter than the print 
from the newer printer. I can make adjustments to accommodate this 
difference, but I wonder what is the reason for such a large 
difference in ink laydown. Front end on both is 20% dot gain and 
back end is 15% and proofed at 20% dot gain. The older printer image 
is even warmer that the newer printer image, but I filled both the 
black cartridges at the same time from the same bottle of ink. That 
eliminates the possibility of differences in ink content coming into 
the equation. I haven't, or understand the need to make printing 
adjustments to the older printer to get the same results from both 
printers, but if that is going to be needed; there's no problem with 
that, but I would like to know what is causing the initial 
differences in prints. Any and all views on this will be appreciated 
and tried by me to further learn about printing idiosyncrasies.

Your friend in Photography,

Johnny

Hello Johnny,

>I have two Epson 1280 printers and when I print the same image using 
>the same ink (Eboni) the results are decidedly different...

Wow, that is strange.  How about swapping the carts...that will show
whether the difference is in the cart or something in the printer.


Regards,
Clayton


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

Johnny,

Another thought...Is there any difference in the dither pattern as
seen with a loupe, and in particular, does one have worse dither
banding than the other?


Regards,
Clayton


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

Hello Clayton,

Thanks for the suggestions. I tried switching the carts with no 
change in the resulting prints, and then I changed the FE to 20% and 
the BE to 10% with "Proof at 10%" and adding a curver to give screen 
image like other print, and the one that was printing much lighter 
did print darker and more like the other printer set with FE=20% and 
BE=15% proofed at GG1.8. I'll just need to make these adjustements 
each time I do BO on this particular printer. I don't use this often 
so I run a BO print through it to keep the nozzles open. The color 
nozzles seem to stay cleared.


Your friend in Photography,

Johnny


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Clayton Jones" 
<cj@c...> wrote:

> Johnny,
> 
> Another thought...Is there any difference in the dither pattern as
> seen with a loupe, and in particular, does one have worse dither
> banding than the other?
> 
> 
> Regards,
> Clayton
> 
> 
> Info on black and white digital printing at    
> http://www.cjcom.net/digiprnarts.htm

Hello Johnny,

>Thanks for the suggestions. I tried switching the carts with no 
>change in the resulting prints

Well, that answers that question.  At least you know it's not the
carts.
Are the drivers the same version for both?


Regards,
Clayton


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

Hello Clayton,

I am using both from the same computer. Wouldn't that mean they both 
used the same installed driver? Makes me wonder.


Your friend in Photography,

Johnny

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Clayton Jones" 
<cj@c...> wrote:

> Hello Johnny,
> 
> >Thanks for the suggestions. I tried switching the carts with no 
> >change in the resulting prints
> 
> Well, that answers that question.  At least you know it's not the
> carts.
> Are the drivers the same version for both?
> 
> 
> Regards,
> Clayton
> 
> 
> Info on black and white digital printing at    
> http://www.cjcom.net/digiprnarts.htm