Mike, IPC-SM-840C "Qualification and Performance of Permanent Solder Mask" has
several Test Methods for different types of solder resist material, but probably the
only applicable one TM 2.3.23 addresses the use of methylene choride in addition to
other environmentally unfriendly materials.

I have some notes pencilled in my working copy that suggests that this TM will be
removed in the next revision.  The "work-a-round" we have is to suggest consulting
the manufacturer of the solder resist you are using and ask them to provide you with
the best method to test the cure.  (I'm not sure if that is like the fox guarding the
hen house or not.)  Jack

Jack Crawford, IPC Project Manger - Assembly
2215 Sanders Road, Northbrook IL  60062-6135
[log in to unmask]        http://www.ipc.org
847-509-9700 x 393
fax 847-509-9798

>>> Mike Johnson <[log in to unmask]> 03/18/98 05:49PM >>>
We have recently stopped using metheline chloride to test the cure of
our liquid imaginable soldermask and nomenclature for safety and
environmental issues. Is there another method that anyone knows of that
is safer for personnel and environment that is cost effective?  Please
help.
 Mike Johnson
Quality support services lead
PC boards Chanute, Kansas

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