Re: Commercial Printers and Color Management
Re: Commercial Printers and Color Management
- Subject: Re: Commercial Printers and Color Management
- From: Terry Wyse <email@hidden>
- Date: Mon, 06 Oct 2003 15:16:13 -0400
on 10/6/03 1:46 PM, Nick Virgilio wrote:
>
And the problem...The offset printer recently went direct to plate and they
>
are complaining that our proofs do not match their press. They say that our
>
digital proofs will never be as good as a matchprint as they do not have the
>
same dot structure.
That's a smokescreen. Dot structure has little if nothing to do with color
matching. Rosettes and moire patterns, yes, but not color matching. When you
measured/profiled your Matchprint, you effectively profiled the effects of
dot structure/rosettes on color matching. The one catch would be if the
screening you used on your Matchprint is significantly different that your
printer's.
As far as their comment about your proofs not matching their press, I would
say it would be more accurate to say that their press does not match your
proofs! My guess is that since going CTP, they did not "correct" their press
dot gain back to what they were used to getting prior to CTP.
What sort of proof are they using internally? If it's a digital halftone
proofer (Approval, Fuji FinalProof etc.) then profile that and use this in
conjunction with your proofing RIP/Epson 10600.
>
And then there is the "correct" lighting discussion I
>
keep having. We match all proofs to original artwork under 5000k lights but
>
the end user will not have 5000k lights when hanging the work on their wall.
>
Our Best 9180 proofs look extremely magenta under improper lighting, where
>
as the offset sheets and matchprints are not as affected by different
>
lighting. I get complaints about this too.
Doesn't matter as long as your 10600 proof is not the final product. If you
do your internal proof-to-artwork matching under 5000K lighting and the
press run is matched to this proof under 5000K, it should all be just fine.
BUT I would check out the lighting at your printer just in case. You be
amazed how many places I've been that have wildly incorrect lighting at the
press console.
There are a couple of ways to attack the metamerism issue with the 10600
(Ultrachrome or Archival inks I presume?): 1) change papers (personally, I
would use Best's 8180 or 7180 papers; 9150/9180 paper has never worked for
me for commercial offset proofs) and 2) re-calibrate/profile the 10600. If
this is a BestRIP, there are different techniques you can use during baselin
creation and profiling that will minimize metamerism.
Cheers,
Terry
--
__________________________________
WyseConsul
Color Management Consulting
v 704.843.0858
e email@hidden
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