Re: UV Brighteners
Re: UV Brighteners
- Subject: Re: UV Brighteners
- From: Les Schofer <email@hidden>
- Date: Sat, 10 Feb 2001 10:35:05 -0500
- Organization: Schofer Digital
Joel Johnstone wrote:
Thus there is no completely correct answer. Fluorescence is a color
measurement nightmare, but it really helps color "come alive" to use a
crude unscientific term. Even laundry detergent has so called "bluing"
agents or flourescent materials added so that your shirts come out
"whiter than white."
I profile using the Colormouse with CB Matchbox 4.0. On my first attempt
profiling a target from my Kodak 8650PS in CMYK I got a real decent
result. When I tried to develop a profile for its RGB (CMY) output I gor
significant shifts to magenta in the lighter grays, and over to cyan in
some of the darker ones. Several days ago I got the idea that this may
be because I was printing the RGB files with the media's UV coating, as
this is how I print all the prints I deliver to clients. When I proof
CMYK output, however, the ribbon's 4th patch is black, and no UV coating
is laid down. Your excellent explanation hints that the UV cating could
be skewing the readings the Colormouse takes, whereas its presence is
undetectable to the eye. Do you think or have specifid experience that
this could be the problem?
Les Schofer
Schofer Digital Photography