Re: Please check this conifg for me and give your opinion
Re: Please check this conifg for me and give your opinion
- Subject: Re: Please check this conifg for me and give your opinion
- From: Graeme Gill <email@hidden>
- Date: Thu, 29 Mar 2007 13:20:20 +1000
Lee Blevins wrote:
Why is it important and what kind of problems happen if you don't have a
UV cut spectro?
A UV cut spectro isn't some kind of magic. By filtering out the
UV in it's measuring illuminant, it "turns off" the FWA in the
paper. This great if there is no UV in the normal viewing
environment for that media, but a really bad thing if
there is UV in the viewing environment and FWA is active.
(The paper manufacturers certainly expect that there is some
UV under normal conditions, or they wouldn't bother putting
FWA in the paper!)
Ideally the instrument would measure the samples using
exactly the illuminant that will be used to view the media.
In practice this is rather hard to arrange. Many instruments
use an incandescent lamp that moderately stimulates the FWA.
Graeme Gill.
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