Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

I just used a whole can of PRP200 without any decent result, it seems
this stuff is now absolute rubbish?

The thing is I had recently used up an old can of PRA200H RP50, it was
many many years old and was giving me rather perfect results, so i am
not new to this stuff........

The new PRPs, well actually dated 2003, got cheap because supposedly
out of date, I didn't think it was a problem,thinking er what I had
already is ages old and still working..........

When I spray it on the copper, it bubbles up, and leaves patches
without resist, seems the solvent is stuffed. My cleaning method is 3M
abrasive matt, followed by a powder cleaner - Ajax. ,wash under tap,
then dry with paper tissue.

what makes me mad is this stuff is not cheap new, and i still had paid
$20 for 2 cans.......

can anyone else relate to these problems?