I also use patterson RA4 printmaster at room temp. It lasts pretty much forever. Just last night I developed some prints in RA4 chems that has been unused for more than one month and they all look fine. The original developer was mixed early December 2004 and has been replenished 2 times since then.Quote:
Originally Posted by psvensson
I've been replenishing the developer as required to make up volume.