Response to Compensating developers and accutance developers

I have a War Department Technical Manual of Photography dated July 1, 1941 that has this to say about Para-aminophenol hydrochloride. "The rapidity with which a Para-aminophenol developer will develop an image decreases rapidly as the solution is being used. This can be prevented by adding, at intervals, small amounts of accelerator to the solution." Interesting.

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