In a message dated 2/10/00 7:33:41 PM US Eastern Standard Time,
[log in to unmask] writes:

<< I have a question for the "guru's" of PWB cleaning, and obviously it
relates
 to
 the new legislation (Montreal Protocol) which now bans the use of Ozone
 depleting substances containing CFC based materials.  So, with that in
 mind...."What are the best "cleaning solutions" (chemicals) to use which are
 most effective for removing the flux residuals from PWB's that also has
 compatibility with a wide variety of different chemicals and materials such
 as
 adhesives, connectors, sleeving, wire, inks, epoxies and etc.?"    In
 essence,
 we all know that establishing a suitable substitute is no small task, and
 involves many trade-offs as well.   However, I would appreciate anyone
 sharing
 their experience with regard to this endeavor. >>

JNJ has a fairly new product out called Aquasonic that fits the bill here
very well.  It is a water based chemistry that is safe for degreasing
plastics yet aggressive enough to remove flux and even uncured epoxy.  It is
fully filterable and can pass thru a DI bed without harm to the bed.   Works
well in ultrasonic stencil cleaners or in-line board cleaners.

Jon Moore

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