Re: Creating Proofs for ISO Coated & FOGRA Proof Verification
Re: Creating Proofs for ISO Coated & FOGRA Proof Verification
- Subject: Re: Creating Proofs for ISO Coated & FOGRA Proof Verification
- From: Joseph Yates <email@hidden>
- Date: Fri, 15 Dec 2006 12:41:49 -1000
- Thread-topic: Creating Proofs for ISO Coated & FOGRA Proof Verification
Title: Re: Creating Proofs for ISO Coated & FOGRA Proof Verification
on 12/15/06 11:15 AM, email@hidden at email@hidden wrote:
I would recommend that u do a test and check proofs within say and hour of producing them and then again every day for two weeks - the problem is that "us" printers see them two weeks later and they do seem to change
Peter
Terry wrote:
In regards to tolerances, there's a few things to consider. One is
> proofer *calibration* tolerance and the other is dE tolerance to a
> specification such as Fogra27 and ISO 12647-2. Calibration tolerance
> should be MUCH tighter than the pass/fail tolerance to a
> specification. I would think calibration tolerance should be <1dE
> average and perhaps 3 dE peak while tolerance to a specification
> should be more like 3 dE average and 5 dE peak.
That's good advice Terry - so I'm back to the calibration of the proofer to
see if I can tighten that up a bit.
There are also tolerances for paper dE and primaries dE - what are your
recommendations for these?
Peter, Thanks for the recommendation. I usually let them dry overnight (from 12 – 24 hrs) before measuring them for verification.
Really? Everyday for 2 weeks? Wow - never had that kind of time luxury where we could wait 2 weeks to send out a job to our printing vendors...
They (we actually!) always seem to need it yesterday...
Have others noticed a major color shift after 2 weeks?
I remember Martin’s posts recently about problems with the EFI 9200 proofing stock – but was assuming that was an unusual and isolated incident with a particular batch of paper. Is this something I should be concerned about?
Joseph Yates
Pacifica Island Art, Inc.
Maui, Hawaii
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