I've been trying to develop a decent lith developer with mixed success. I've figured out the right balance between hydroquinone, sod. sulfite, and KBr for me. I'm using saturated Pot. carbonate as the alkali. I'm basically not happy with the developer life both on the shelf and in the tray. With help, I figured out I want the Part A to have a pH of 4.....what is the best acid to achieve that? Regarding the tray life, is there anything other than sodium sulfite that would serve as an anti-oxidant? Thought about ascorbic acid, but it seems that adding a developing agent would be a bad idea. Anyway any insight from the chemists out there would be greatly appreciated.