Check out Don Hutcheson's presentation "The Quest for Real Print Standards"
at www.gracol.org DTR004 and the GRACoL spec are likely to change in the
near future. Don's method has been used on several GRACoL pressruns, with
promising results. L. P. Thebault will be doing the next GRACoL run next
week. We have used this method, and we like what we have seen.
Bret Hesler
L. P. Thebault Company
> Date: Thu, 14 Jul 2005 05:24:50 -0700 (PDT)
> From: "RS" <email@hidden>
> Subject: GRACoL Press Sheets & Dot Gain Curves
> To: email@hidden
> Message-ID: <email@hidden>
> Content-Type: text/plain;charset=iso-8859-1
>
> GRACoL 6.0 provides a helpful chart of dot gain values CMYK inks at 50%
> for various paper and line screen combinations. It lacks, however, dot
> gain values at points other than 50%. I'm documenting the current dot gain
> curve of a press and am interested in doing a more thorough comparison of
> this data set, and I'm curious if anyone here has seen (or measured
> themselves) dot gain values of a GRACoL DTR 004 sheet in steps of 5% or
> 10%. (Although I've not seen one, I'm assuming the GRACoL sheet has step
> wedges of each color).
>
> While the press with which I'm working may print within GRACoL's dot gain
> range at 50%, I'm interested in seeing how much its gain differs in the
> quarter- or three quarter-tones. I just want to be certain there isn't
> anything wonky going on with the press at points other than the midtones.
>
> email@hidden
>
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