On Fri, Feb 15, 2013 at 12:32 AM, Leon Heller <
leon355@...> wrote:
>
> Photo-resist goes off after a few months, which could cause a problem
> with old stock.
When making PCBs at home, I use Kinsten pre-sensitised board. I
haven't had a problem with photoresist going off, because I seal the
bag tight after I've cut off as much as I need, and store it in a
lightproof box. I haven't had luck with developer though. It seems
that once it's made up into a liquid, it doesn't keep for more than a
few weeks.
(Re the Circuit Specialists prices, their prices are about the same
for blank stock as I sell professionally made double sided, routed
silkscreened board for, including shipping :-) )
Mitch.