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Subject: Re: [Homebrew_PCBs] developing Aqua-Mer PR photoresist film

From: Russell Shaw <rjshaw@...>
Date: 2005-11-19

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.