It's the same one used in the Instructable but as I'm in the UK I tracked down a European supplier. It's Dynamask 5000 and I ordered a roll from from octamex.de
So far I found it easier to work with than photoresist boards! However I've only used the solder mask on simple CNC-milled through-hole boards.
I managed to get my first SMT board etched last night. The quality is good enough for TSSOP20, but I believe it could be better. I'll let you know how well the mask works for SMT when I get round to soldering it.
Fred
--- In Homebrew_PCBs@yahoogroups.com, Vicent Colomar Prats <vicentecolomar@...> wrote:
>
> Can you tell us what kind of solder mask film have you used? Brand and
> model? Cheers.
>