Re: GRACoL densities
Re: GRACoL densities
- Subject: Re: GRACoL densities
- From: Ray Maxwell <email@hidden>
- Date: Tue, 26 Apr 2005 09:17:23 -0700
Hi Roger,
In my experience it varies with press, ink, and paper. You have to do
wet measurements and then measure again dry. You then calculate your
own wet target densities or dryback.
"Your mileage may vary."
Ray
Roger Breton wrote:
Ray,
Are you double sure it's dry?
Never mind, Ray. I just found the reference at the bottom of page S2 of the
v6.0 2002 book : "Ink density are dry". But then they add: "Dryback values
are included". What do they mean by that?
Take Grades #1 & #2 in that table on page S2. Under Solid Density, they have
1.70 for the black. Black density, I found, drops the most when it dries. So
in order to achieve 1.7 dry one has to aim for 1.8 or more wet. But I fail
to see what "dryback values are included" could possibly mean in this
context? The old SHoPS GATF study included tables for dryback but there is
nothing like that here.
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
|
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