Re: GRACoL densities
Re: GRACoL densities
- Subject: Re: GRACoL densities
- From: Roger Breton <email@hidden>
- Date: Tue, 03 May 2005 11:03:22 -0400
So ISO 13656 mandates the use of a polarization filter?
I tend to agree with Rich that in the case of highly reflective material
like foil measugin with a pol filter maybe the only game in town. But for
measuring "regular process conditions", as far as I know, in North America,
Status T response precludes the use of a pol filter.
I wish I knew what the prevalence of that practice is.
Are you saying that most printers in Europe measure with pol filter all the
time?
> Contrary to that, ISO 13656, Graphic technology - Application of
> reflection densitometry and
> colorimetry to process control or evaluation of prints and proofs,
> and ISO 12647, the process standard print, suggest measuring with
> polarisation filter, because this makes the measurements practically
> independent
> of gloss and dry-state of the material and inks.
>
> Rolf
Mfg,
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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