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Photographers' Formulary Residual Hypo Test - 100ml
Photographer's Formulary Residual Hypo Test is a simple chemical test that can be used to determine if a print or filmstrip has been adequately washed.
The test is based upon the formation of a yellow stain of silver sulfide - silver thiosulfate on the white of a test print (or the clear area of a negative film strip) when the test solution is applied.
Developing & Processing Supplies
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- Price: $17.95
Enlarging Paper
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- Price: $69.92
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