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: Terry Wyse <email@hidden>
- Date: Fri, 15 Dec 2006 13:01:11 -0500
On Dec 15, 2006, at 2:13 AM, Joseph Yates wrote:
on 12/14/06 1:07 PM, Terry Wyse at email@hidden 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?
Paper should be < 1 dE in my opinion. When shopping for proofing
media, my advice would be to find a supplier/vendor that will
GUARANTEE < 1 dE from roll-to-roll or they will replace the roll. Of
course, you will need to have a system in place to monitor this.
Easiest thing is to get yourself proof verification software (Monaco
QCcolor Desktop is what I most often recommend to my clients) and
then start monitoring your proof output.
As far as primaries, the "official" dE tolerance for ISO is 5 dE
(dE76 or dE(ab)) but I would be more comfortable with < 3 dE if your
looking to do high quality proofing. Calibration tolerance should be
lower than that (<2?) in my opinion.
Regards,
Terry Wyse
_____________________________
WyseConsul
Color Management Consulting
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email@hidden
704.843.0858
http://www.wyseconsul.com
http://www.colormanagementgroup.com
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