Proofing Pantone
Proofing Pantone
- Subject: Proofing Pantone
- From: Matthew Kelly <email@hidden>
- Date: Sat, 8 Feb 2003 12:39:21 -0600
I know that this subject has been dealt with many times on this list,
so excuse me for being redundant with this, but I need to verify what I
have read in the past.
We are a commercial printer currently using AGFA's Sherpa 43 as our
large format proofer, and have been getting fairly good results, with
the profiles we have made, matching our presses. Using that proofer
for Pantone simulation has caused problems with customers'
expectations, even though we mark the proofs as being a process
simulation of the Pantone color. What we would like to do is present
the customer with some definitive information as to what are the
limitations of a CMYK proofer.
If I may get some information on the following:
1) What percentage of Pantone colors fall within the average CMYK
color gamut that are within a Delta 2? (It is my understanding that
the human eye cannot perceive any color difference in colors that have
less than a Delta 2 variance.)
2) I am aware that Pantone colors vary in dot gain on the press. What
curve is applied in Photoshop to each channel of the duotone to render
gain, and what curve is then applied at the RIP for the proofer? Does
the RIP of a CMYK proofer convert the Pantone color in the duotone to
CMYK and print according to the profile information?
3) What suggestions might one make for a large format proofer that
will do a better job of proofing Pantone colors? I have a leaning
toward the Roland HI-FI, using a Best Colorproof. I would prefer a RIP
that accepts PDF 1.4, though we can send a Delta list. Since we are a
production facility, our number one requirement is support for the
equipment. We are located in San Antonio, and finding qualified
personnel to repair large format proofers is a problem.
Thanks,
Matt Kelly
Graphic Dimensions, LLC
11 Burwood Lane
San Antonio, TX 78216
210-541-0707
FAX 210-541-0727
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