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IJC / OPM Questions

2003-03-30 by Jeff Randall

Robert, Antonis, and the other beta testers:

Bravo--well done! I, like Paul, am eagerly awaiting the Windows 
version.

In reviewing the v 1.04 manual, several questions came up as I looked 
at the pages dealing with the Ink Tweaks and Linearization windows 
using a 1280_FS_EAM example.

1) In the Hex-FS inkset, the Pc=C and Pm=M -- basically yielding a 4-
ink inkset. I was wondering why the curves for the Pc-C and Pm-M 
were so different? I think I can see the advantage of starting them 
off in a slightly staggered fashion to smooth the transisition 
(minimize dots), but not later. Did any one try using only 4 curves 
(actually 6 curves, but with 2 doubled up)?

2) The linerazation figure shows significant grayscale "lightness" 
between 50 and 95%. My first instinct would be to go back to the 
curves in the Tweaks Window and pull up the Pc,C,Pm,and M curves to 
darken the 50 to 95% portion of the grayscale. In other words, 
conduct more of the linearization directly in the curves rather than 
apply what I assume (jump on me if I am wrong) to be a single 
transfer function to the composite profile. Did anyone experiment?

Thanks.

Jeff Randall

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