There was a company in the Los Angeles area called Shannon Fluorescent
Dyes. You should be able to look them up in the phone book or web. They
were still around about 3 years ago, and made an excellent dye for this
purpose. It was rather expensive (~$400/pound?.

The made this type of product in several forms for bars (hand stamps),
motion picture industry and the like.   It req'd about 0.1% by weight
addition to the flux to give a significant/adequate fluorescence. It
worked really well. I had looked through various products and hands down
they had the best. There are many on the market but most aren't heat
stable enough to survive the soldering process. 

If you can't find them, let me know and later this week I may have the
time to find those details. 

Rich Kraszewski 
 


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Tom Gervascio
Sent: Monday, February 16, 2004 9:00 AM
To: [log in to unmask]
Subject: [TN] fluorescing agents


Does anyone know of a liquid fluorescing agent that I can blend in with
some no -clean rosin fluxes and solder pastes? I'm trying to do some
qualitative cleaning tests under low standoff SMT components.

Thanks

Tom Gervascio
Senior Process Engineer
Sparton Electronics
(352) 540-4040

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