In a message dated 10/9/99 10:51:17 AM Central Daylight Time,
[log in to unmask] writes:

> Any one out there using Kester peelable solder mask, you know the pink
>  stuff? We have noticed that it attacks metal. Dulls HASL land patterns,
>  SMT fillets, attacks LPI mask (sometimes). In one case, where we use it
>  to keep solder off of screw heads, rust formed where the zinc plate was
>  missing.
>  Comments?

Hi-dee ho there!

Sounds like you're using an ammoniated mask...there's a lot of temporary
peelable masks that will contain ammonia...that's what causing your problem.
Don't know what Kester formula your using (they have a few) but get one that
doesn't contain ammonia, if they have one. I use a Chemtronics peelable
mask...no problems thus far.

-Steve Gregory-

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