Well, Steve, there is the "approved" ways of doing things, which strangely
enough seems to always be the "expensive" way, and then there is the cheap
way...which seems to work, but, may not have been blessed by the gods of the
electronics world....

The "nonionic" residues you speak of are usually metallic residues, either
some kinda Lead salt, often Chloride, or a Tin oxide.

My usual approach is to use a fully aqueous cleaner, mildly alkaline, with
some kinda chelation to pick up the metal salts.

Some years ago somebody whispered that they used a machine dishwasher with a
typical machine dishwashing compound, and got real nice results.....
So we got some of this stuff, analyzed it, figured that PCB's do not need
chlorine to sanitize them, but could probably use a bit of anti-tarnish
compounds to minimize attack on the metals, and we now sell this product.
There are others, but I would warn you away from solvent containing cleaners,
and steer you towards full aqueous alkaline (to dissolve the Rosin) chelated
(to dissolve the metals) products.

This kind of product is going to be MUCH less expensive, as solvents are
costly...

Rudy Sedlak, who is still red-faced, but not so badly...

---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------