Homebrew PCBs

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.