This formula is recommended for development of Cykon, Cykora, Brovira, Convira, Indiatone and similar papers. It can also be used for development of roll, pack and sheet film when brilliant negatives are desired. It may be obtained in packaged form by ordering Ansco 125 Developer.


Stock Solution

Hot Water (125F or 52C) 750 ml
Metol 3 g
Sodium Solfite, anhydrous 44 g
Hydroquinone 12 g
Sodium Carbonate, monohydrated 65 g
Potassium Brobine 3 g
Water to make 1 L


PAPER DEVELOPER: Dilute 1 part stock solution with 2 parts water. Develop 1 to 2 minutes at 68F (20C). For softer and slower development dilute 1 to 4, and develop 1 1/2 to 3 minutes at 68F (20C). For greater brilliance, shorten the exposure slightly and lengthen the developing time. For greater softness, lengthen the exposure slightly and shorten the developing time.

FILM DEVELOPMENT: Dilute 1 part stock solutin with 1 part water and develop 3 to 5 minutes at 68F (20C). For softer results, dilute 1 to 3 and develop 3 to 5 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From Ansco Formulas for Black and White Film by GAF, 1948 – Formulas are provided for historical reference.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.