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Ansco 81 Repolith Film Developer

FormulasFormula 81 provides a single-solution developer of excellent keeping quality for the development of Reprolith Film.


Hot Water (125F or 52C) 750 ml
Hydroquinone 35 g
Sodium Sulfite, anhydrous 55 g
Sodium Carbonate, monohydrated 80 g
Citric Acid 5.5 g
Potassium Bromide 10 g
Water to make 1 L


Do not dilute for use. Normal developing time not longer than 3 minutes at 68F (20C).


From Ansco Formulas for Black and White Film by GAF, 1948 – Formulas are provided for historical reference. They may not work well with modern films and papers. Some of the chemicals can be dangerous. As with all photographic processes, be careful.