RE: proofing to match sheetfed uncoated
RE: proofing to match sheetfed uncoated
- Subject: RE: proofing to match sheetfed uncoated
- From: Roger <email@hidden>
- Date: Wed, 15 Apr 2009 15:17:34 -0400
Stewart,
Have you ever measured the color of inks on a printed uncoated sheet?
Regardless of what press being used to print it, uncoated paper will never
have the sparkle and vividness of a number 1 coated sheet (GRACoL2006_C1).
If I were you and if you had access to a spectro, I'd suggest you measure
the solids and overprints (RGB) off a good, printed uncoated sheet. Then
compare to GRACoL2006_C1, you'll find an ocean of difference between the
two.
Unfortunately, as of today, IDEAlliance has not come forward with an
Uncoated dataset. (Not that I would personally know of) So we're left pretty
much to ourselves to agree on what "good" uncoated printing ought to be --
unless you want to adopt one of the standard Fogra uncoated datasets
(nothing wrong with that).
www.fogra.org
Roger
> Lately I have been working on an Indigo 5000; trying to make it a
> reliable
> proofing machine. So far so good; especially when proofing to GRACoL
> specs. It should be mentioned that we are also using a Creo Production
> Flow RIP. Now that I have my sheetfed coated process where I want it;
> I'm
> now looking to match an uncoated sheetfed press sheet. If I use the US
> Sheetfed Uncoated profile and my Indigo profile I find that the
> resulting
> proof is very muddy, dirty, etc. etc. Looking at the US Sheetfed
> Uncoated
> profile I see that the CMYK colorants are somewhat muddy - is that
> where
> my issue is? Maybe I need to create a profile that is not so muddy in
> the
> first place. I know from doing press checks that an uncoated sheet will
> print with dot gains ranging about 3 - 5 percent higher than a coated
> sheet; but I really cannot see the inks being as contaminated as they
> appear in the canned US Sheetfed Uncoated profile. I do, however, want
> to
> stay within "Industry Standards". Any help would be appreciated. Mike
> Stewart
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