[Lcms-user] graybalance check for provile validation

[Christian B. <bed...@rh...>]

Hello all,

to provide me with a simple method to check, wether our color-laserprinters
need to be profiled again, I created a graybalance strip (http://eazy.amigager.de/~eazy/icc/proofBar.ps).
This strip is created by transforming black values like CMYK(0,0,0,K) with 15<=K<=75 into lab and back to the
current cmyk profile of the printer. This strip is created along with every new profile I create.
I have problems with patches below 20% which get too light, but this seems to be a problem with the profile,
not with lcms. The ICC-engine in front of the printers (jaws) does create the same light results, so
Profilemaker 4.1 might be the bad one here (or me, with choosing wrong options for profilecreation ;).

My question: is this a good way or are there better ways to validate a profile?


-- 
Gruss,
Christian Bednarek