Response to Final Soak In PMK

According to Hutchings, PMK does not stain during development, but only afterward, and the staining action is enhanced by an alkaline environment. I find that most of my staining takes place during the water bath I use for a stop, though I still put the film back in the developer for a couple of minutes after I fix it. When I used an acid stop, the staining took place during the final soak in the used developer. I definitely get better stain without the acid stop. Stain is directly proportional to silver in the developed negative.

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