Re: When to use UV filters
Re: When to use UV filters
- Subject: Re: When to use UV filters
- From: Henrik Holmegaard <email@hidden>
- Date: Fri, 21 Sep 2001 09:32:34 +0200
Is there some definitive way to know whether a UV filter is
needed......
When the b* channel in your paper white reads a negative value.
Blacklights and whitelights and whatever else you have to go buy. If
you just paint a document in Pshop L100 a0 b0, convert into the
printer profile you wish to check using Absolute Colorimetric, and
wind up with a negative b* value, you've got the blues. This tip is
ooold, it's in abcB on www.iccabc.com.
This is an issue especially
true of most of the Epson papers as well as the the Fuji Pictrography
papers.
Shop for other papers. David's idea is that it's American to buy blue
papers because people in the US buy printers that ship with papers
with optical brightener. I'd say it's taking the US / EU thing a step
too far -:).
Most publication paper stocks are "dead" as far producing florescence.
By and large, but not always. Again if you only have the simulation
and output profile, and not the paper (who has?), just use Pshop.
Because if the output page white has optical brightener, then your
proof is supposed to faithfully show it. That's the idea of a proof.
If your output page white is neutral, and your proofer page white has
optical brightener, or you are using the studio printer not in
proofing mode but for presentation printing, and you misconfigured
the studio printer with a UV paper, then you'll also misconfigure the
proof.
Keep in mind that there is a simulation chain involved, so the cast
may emanate from several steps back.