Response to Drying Marks

Melvin is going in the right direction, at least in adding a water filter. Check the mineral content of your water supply. Photo-flo cannot overcome the effects of excessively high hardness in your water, especially cold water that is warmed or heated, heating cold water tends to drive out calcium. Have you ever seen the white calcium deposits in at pot used for boiling water? Or give your negatives a good final rinse in distilled (mineral free) water with a little Photo-flo.

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