Quote Originally Posted by psvensson
Ron Mowrey, ex-Kodak, sez RA-RT replenisher works fine for room-temp. development. Time is around 2 mins. I use Patterson's Photocolor chemistry in trays. Works very well, except that the stated times are too short - extend by 50% for better print-to-print consistency. The diluted developer lasts a very long time without replenishment.
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.

I've been replenishing the developer as required to make up volume.