Hi, On 24/02/11 07:23, Graeme Gill wrote:
I'm not sure what you mean by that. The way to do a proof is to take the Press CMYK (contone separation) and feed it into a link made between the press profile and the laser printer profile. Typically this would be an absolute colorimetric link for background simulation.
LCMS can create a 3-profile proofing transform that does this from source data in a single step (and can mark out-of-gamut colours with an alarm colour, too, if desired) - I think that's what Craig's referring to.
(This is assuming you have managed to profile the press - a non-trivial task typically, given the cost of running it up for a test chart, and getting the press to behave in a similar manner to "normal".)
Agreed - if you do devote a press run to profiling (which we've done before) it's worth putting some photos on the sheet along with the patches - just so the press operator has something on the sheet that looks like a "real" job. It also gives you something to evaluate your proofs against, because you'll notice colour errors in a photo with skin-tones way sooner than you will a random field of coloured patches.
All the best -- Alastair M. Robinson