You are working in a safe CMYK workflow (all data cmyk and no automatic colour management), this is a guess from your comments, but please be explicit if that is correct.
Sampling an area is a strange way, I'd compare the channels in the history. Please go to adobe site and request a more visual TAC warning I have, but this is so clear that you need the TAC warning in PS and not only in InD and Acrobat.
Applied a simple UCR profile? What do you mean? What rendering intent? Black point compensation? I'm perhaps thick but not understanding what you are saying.
Your numbering your steps with two 1's and two 2's isn't really helpfull to me, perhapps it is to others.
Personally I just prefer to work in an RGB workflow, with that wich is to be colour managed, saves me from TAC problems. Sometimes you will have to convert from CMYK to RGB or LAB and then back to CMYK, though there is support for device links in CS4.
|