Using a pol filter
Using a pol filter
- Subject: Using a pol filter
- From: Henrik Holmegaard <email@hidden>
- Date: Fri, 12 Oct 2001 07:48:52 +0200
I've recently profiled a friend's Olympus P400 dye-sub printer as a favor,
and got weird results.
I made the
profile with ColorBlind Pro 4 and a Gretag/MacBeth Spectroscan. I used the
none filter on the 'Lino. Should I have used a polarizing filter? I haven't
checked the Olympus media for brighteners. Any suggestions?
While this is not true of Kodak dye sublimation papers which are
glossy, some dye sublimation printers use media which distort the
black point.
This was the case with a dye sublimation proofer Sony attempted to
launch, but which as far as I know died on the vine. The term used
for the paper escapes me, it was something along the lines of
'variable dot paper'.
As a rule, use a Pol filter when you need a rough surface to react
like a glossy surface. For instance, use a Pol filter for newsprint
and uncoated papers ... and for any 'variable dot' paper still out
there in OEM or Sony channels -:). However, I don't think there is a
specification for measuring Lab polarized, it's just one of those
things we have to do, spec or no spec.