I've just noticed something that might be useful to other people using
pre-coated boards.
I was using up some rather old off-cuts while I waited for some new material
to arrive, without much success. The new material arrived this morning and I
noticed that the faint yellow pattern on the resist after UV exposure was
much more noticeable than it had been on the old stock.
Leon
--
Leon Heller
Amateur radio call-sign G1HSM
Yaesu FT-817ND transceiver
Suzuki SV1000S motorcycle
leon355@...http://www.geocities.com/leon_heller