My Public Relations and Speechwriting instructor Dave Turnbull gave me some darkroom chemicals last spring after he cleaned out his darkroom. Amoungst the assorted chemicals was a quart kit of Diafine, fine grain film developer that pushes the film speed, in case of the Agfa APX 400 I shot yesterday the speed went to 500 ISO with no grain increase on average. I became a convert, I still love my HC110, Rodinal and D-76 but with another developer in the tool kit and that is low maitainence as long as you follow the instructions.
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