Techform Laboratories, Inc. makes an array of temporary solder masks that can
be screen printed. The specifics are:
Techform Labs
2021 N. Glassell Street
Orange, CA 92665
Phone: (714)-921-9054
Fax: (714)-921-2119
Attn: Gary DeMello
I believe that Techform has been bought out by a larger company, but can't
remember who it was.
Hope this helps
Larry J. Fisher
Dexter Electronic Materials
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