Re: Optical Brighters while using UV Filter
Re: Optical Brighters while using UV Filter
- Subject: Re: Optical Brighters while using UV Filter
- From: neil snape <email@hidden>
- Date: Sat, 17 Jul 2004 23:35:06 +0200
on 17/07/2004 22:53, Cedric Briscoe wrote :
>
Fyi: the stock is Epson's Premium Semimatte Photo Paper (250) and the white
>
point is Lab: 96.5, -0.9, -1.4
I wouldn't bother with the optical brightener option as 1) you have a uv cut
off filter on the light source and 2) the resulting paper white reading is
in range and seems to have correctly read the paper without an excessive
blue reading. I consider when the b channel nears -4 it's a best to use the
optical brightener choice in ProfileMaker. If PM finds the numbers low
enough in blueness the option is normally greyed out for building the
profile. I don't know the exact check point for this is , although someone
else may here on the list.
Neil Snape nsnape @ noos.fr neil_snape @ mac.com
http://mapage.noos.fr/nsnape
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