Homebrew PCBs

David Griffith wrote:
> I've acquired a roll of liquidated Aqua-Mer PR photoresist film that I
> intend to cut up into smaller quantities for sale on Ebay (toot! toot!).
> My question: what is the correct developer?  I picked up a bottle from a
> downtown shop that turned out to be a sodium hydroxide solution, which I'd
> rather not mess with given that it's relatively unforgiving with
> overdevelopment.

Sodium hydroxide is stripper. Try 10g/L sodium carbonate at 25-30degC.