Steve,
I saw this once many years ago with a UV cured LPI mask. The UV lamp was
not working and the SM got only a thermal dry with no real cure.

John Maxwell

At 04:01 PM 1/13/2004 -0500, you wrote:
>Hi All!
>
>You're probably wondering; "What the heck? Snake board?" That's what I call
>it.
>
>Built this assembly (all PTH), waved it, and then washed it, went to get it
>out of our cleaner, and all the solder mask is coming off in big slabs just
>like a snake does when he sheds his skin! Go look at "Mask Peel, Mask Peel
>2, &
>Mask Peel 3" at:
>
>http://www.stevezeva.homestead.com
>
>I wash in a Electrovert MCS-1000 with Kyzen XJN, and the mask on the board
>was a Dupont Vacrel dry film. Never have had a problem with Vacrel dry films.
>
>The mask doesn't look degraded, or damaged in any way...it's just not stuck
>to the board! Anybody ever seen this happen before? Unfortunately, this was a
>rather expensive assembly.....:^{
>
>Nice way to start the year off, huh?
>
>-Steve Gregory-
>
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