[argyllcms] Ink Limit Override

  • From: Jason Campbell <campbell.jj76@xxxxxxxxx>
  • To: <argyllcms@xxxxxxxxxxxxx>
  • Date: Sun, 04 Aug 2013 20:04:36 -0400

Hello all.  I am trying to do some specific tests and need to override the
Ink Limit being imparted into the resulting profile.  I am using -l400 in my
call to txt2ti3 (converting CGATS to ti2/ti3 files) then -l400 in the call
to colprof.  Note these are specific in that I have no black inking going
on, and I do see that the programs are taking the request to override the
calculated Ink Limit (-v switch).  However when I start getting to the 80%+
tone value region, the profile starts sucking out on meŠ It pulls back on C
and M and starts to push Y.  In looking at where argyll wants to pin my
total ink (when left alone; no -l switch) it puts me around 260%, and that
is what I see in the curves coming from xicclu -- that it starts pulling
back and at 100% C, M, and Y add up to just about that -- despite my attempt
to push it.  I understand argyll is probably modeling reality and I am
assuming I'll be told I cannot create something from nothing (if total ink
is found to be 260% you can't arbitrarily push it out to 300%)?!  My desire
would be that the curves all push out to 300% in a more 'normal' fashion
versus the kooky business happening past 80%, specifically with the Y
channel.  Any hope for this, or 'it is what it is'?



Attachment: icclu.png
Description: PNG image

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