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Digital BW, The Print

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Re: 2200/OPM extreme sepia profiles

2003-07-04 by Antonis Ricos

the automatic linearization feature of IJC was 
> NOT used for 
> > these since it doesn't distinguish between gray and toner inks. 
> They were linearized "by hand" 
> 
> Thanks for the profile, Antonis. Could you explain the 
> significance of the last (above) statement? Would automatic 
> linearization by IJC have tended to give a profile that was 
> too-neutral (or not uniformly sepia)?


Phil,

linearization would have dealt with the color inks as if they were gray, and would have 
tried to make corrections in density using both color and gray inks. Depending on how  
the curves for color are drawn, this may not make a significant difference - but it's cleaner 
to do it by hand because then you know if you are moving the grays only or not.

In my way of thinking, I make a grayscale first, linearized manually, then add color "to 
taste" and finally compensate the grays to account for the extra density added by the 
color inks. In regards to color, it's by no means exact science (as you may get using 
color managed solutions), but it only needs to please the eye of the beholder. What 
matters is that all the density steps are preserved , and that is in fact very precise science 
with the densitometer.



> Also, what version of OPM was used?

1.02b   creation date: May 31, 2003, 12:02am


Antonis

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