Re:ink color vs proof color
Re:ink color vs proof color
- Subject: Re:ink color vs proof color
- From: Dick Busher <email@hidden>
- Date: Tue, 04 Mar 2003 08:10:36 -0800
- Organization: Cosgrove Editions
Todd Emory wrote:
My question concerns the difference between the measured (Delta E)
difference between solid ink color off press and solid color of proofing.
Is there a standard and/or tolerance for such a measurement? Also, I would
be curious as to what other people are seeing as their difference between
solid CMYK's from press to proof. And, if you found the difference to be
too great to overcome via profiling or adjusting plate exposure, what, if
any, actions did you take to correct the problem? Any and all info is
greatly appreciated.
If you are talking about press proofs you can expect a considerable difference between
dry proofs and wet press sheets. The solid ink densities of a dry proof are less than the
densities on the wet press sheet.
If you are talking about digital proofs vs wet press sheets, I am not sure density and/or
spectral measurements are all that meaningful. In my experience, it is the "visual"
measurements that are most important. Density measurements are used after signing off on
the sheet in order to maintain consistency.
In my opinion a more meaningful number would be dot gain. Does the dot gain on press
match the dot gain of the proof? If it does not then you may see different tonal
renditions between proof and press, e.g. shadows plugging in, etc. If the dot gain on
press is resulting in unacceptable results, then a possible solution is new plates (or
negs) made with new plate curves.
Dick Busher
Cosgrove Editions
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