Detecting fluorescence [was: FA Papers (was: difference hp Z2100 and Z3100)]
Detecting fluorescence [was: FA Papers (was: difference hp Z2100 and Z3100)]
- Subject: Detecting fluorescence [was: FA Papers (was: difference hp Z2100 and Z3100)]
- From: Marco Ugolini <email@hidden>
- Date: Wed, 21 Mar 2007 22:08:26 -0700
In a message dated 3/21/07 9:13 AM, Andrew Rodney wrote:
> On 3/21/07 9:08 AM, "Anthony Sanna" wrote:
>
>> Some questions: Andrew... What's your OB-Checker? Is this a hardware
>> store assemblage?
>
> I use a battery operated Fluorescent black light for location work. I could
> as Robin did, use my Spectrolino.
Those are the two ways I use too: either a black light, or my EyeOne Pro Rev
B (non UV-cut) to look for a "bump" in the spectral energy distribution of
the paper base in the area around 440nm.
Personally, I haven't yet fully tested the reliability of judging
fluorescence by reading Lab values off the paper base (in which a negative
b* value is regarded as a sign of fluorescence, and a positive b* value is a
sign of its absence).
Marco Ugolini
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