profiling papers with brighteners
profiling papers with brighteners
- Subject: profiling papers with brighteners
- From: Armand Rosenberg <email@hidden>
- Date: Mon, 17 Dec 2001 23:46:00 -0500
With all this talk of profiling papers that contain brighteners and
thereby fluorsesce under UV illumination, I just had to wonder...
I bought CompassProfile 2.5 about two years ago with the idea of
profiling an Epson EX inkjet. The profiles I've been making have that
distinctive greenish cast associated with fluorescence. I use Epson
Photo paper & Epson ink measured with ColorMouse 2. So I thought OK,
fluorescence must be the problem.
BUT two years ago, when I bought the CP software, Stuart Dross (then
with Praxi) made one very accurate profile for me to convince me to
buy their software. It was a profile of a Tektronix 450 Dye Sub
printer with Tek paper and transfer roll. He used the same software
but with some type of scanning spectro, very likely non-UV filtered
at the time.
That Tek 450 profile still gives me the best screen-to-print match
I've ever seen with any printer. Thank you, Stuart.
Just recently, I tested both the Epson Photo paper and the Tek paper
with a UV (black) light. Much to my surprise, I found that BOTH
papers are highly fluorescing.
So it appears that my Epson EX profiling problems are NOT due to
fluorescence after all, since CP was able to correctly cope with
fluorescence in the case of the Tek printer...
Unless of course Stuart knew some secret sauce that he did not reveal to me.
The only difference I see is the spectrometer, but I can't afford
whatever he was using.
Can anyone shed some light on this mystery? Why was it so easy (?) to
profile that Tek Dye Sub printer with its very fluorescent paper?
Armand