[argyllcms] Re: printtarg -k options advice

From: Nikolay Pokhilchenko <nikolay_po@xxxxxxx>
To: argyllcms@xxxxxxxxxxxxx
Date: Sat, 24 Jan 2009 15:16:50 +0300

Mike Bowers wrote

> colprof -v -qh -kp 0 .24 .99 .995 .78 -L100 -r1 -cmt -dpp 500SV1440bAG308

You get the banding because You don't set the total ink limit in colprof. You 
need to set the -l key:

colprof -v -qh -kp 0 .24 .99 .995 .78 -L100 -l180 -r1 -cmt -dpp 500SV1440bAG308

In Your case colprof uses ink limit of 210% as You set for targen. But Your RIP 
has more tight limits. The RIP just clips ink volumes while printing. They do 
it AFTER the profile works. So the clipping is non-colorimetric and You get the 
banding.
Your RIP must have higher limits, then the profile. All of the limiting must be 
done in profile. The RIP aim is raster processing and light inks blending 
without overinking. But not clipping by ink limits.

References:

[argyllcms] printtarg -k options advice
From: Mike Bowers

[argyllcms] Re: printtarg -k options advice

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