ISO 12647-7 "tolerances"
ISO 12647-7 "tolerances"
- Subject: ISO 12647-7 "tolerances"
- From: Kevin Muldoon <email@hidden>
- Date: Tue, 22 Apr 2008 16:12:23 -0400
Look, a system can be optimized to a particular reference ... to
very low DeltaEs, but this is to some degree dependent on which
reference it is.
Some degree dependent? 100% degree dependent. Color management is all
about creating CMYK numbers to match a color reference.
Paper is still an issue, and a numerically perfect proof may be
visually unacceptable to the customer.
A proof that doesn't match final press output (or vice-versa) is
unacceptable. A client who doesn't like a press-accurate proof is an
opportunity for more color corrections.
A laminate proofer addresses this pretty well, but it won't give
the super-wow numbers you're floggong
A laminate proofer will most certainly reach 'super-wow' tight DeltaE
numbers. Laminate proofers such as the Kodak Approval have always had
a much wider gamut than the presses they were meant to emulate. As an
example, we have an XP4 running 03 media and a DVL for GRAoL and, as
verification, we measure the entire GRACoL IT8.7/3 and run each patch
reading through DeltaE program (dCIE1994) to see how far we are away
from target values. Our average Delta E for thousands of patches is
perhaps 1.2 and no one patch has strayed beyond a 3.5.
The REAL optimization problem is meeting as many of the customer's
needs as possible without failing on any one objective, keeping the
cost reasonable, and the training and maintenance issues within
practical limits.
If the proof doesn't closely match a standard (regardless of how easy
it is for the customer to operate the proofer) then it's not a proof.
If you are suggesting sacrificing tight color standards for ease of
use, cost, reliability and maintenance, then perhaps we're not
talking apples to apples. I feel that measuring success upon the
'happiness of the customer' as salesmen often do is quite often a
mistake. Ethics demands that the customer is given not only what he
wants but what he needs as well.
--
Kevin Muldoon, Owner
TrueBlueDot - Fine Art Printing
New Haven, CT 06511
email@hidden
www.truebluedot.com
"Our pigment meets your imagination"
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