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Ansco 113 Amidol Photographic Paper Developer

FormulasThis formula must be mixed fresh each time, and it is recommended only for small lots of prints.


Amidol 6.6 g
Sodium Sulfite, anhydrous 44 g
Potassium Bromide 0.55 g
Water to make 1 L


Do not dilute for use. If hot water is used for dissolving chemicals, the sodium sulfite and potassium bromide should be dissolved first and teh amidol added on after the solution has cooled.


For development of Cykora and similar papers use twice the amount of potassium bromide specified above.


Develop 1 to 2 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From Ansco Formulas for Black and White Film by GAF, 1948 – Formulas are provided for historical reference.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.