This developer is recommended for rich, warm-black tones with Cykon, Convira, Cykora, Indiatone and similar papers. This formula may be obtained in packaged form by ordering Ansco 135 Developer.

Stock solution

Hot Water (125F or 52C) 750 ml
Metol 1.6 g
Sodium Sulfite, anhydrous 24 g
Hydroquinone 6.6 g
Sodium Carbonate, monohydrated 24 g
Potassium Bromide 2.8 g
Water to make 1 L


For use, dilute 1 part stock solution with 1 part water. A properly exposed print will be fully developed at 68F (20C) in about 1 1/2 to 2 minutes. Complete development may be expected to take slightly longer with rough-surfaced papers than with semi-glossy or luster-surfaced papers. For greater softness, dilute the bath with water up to equal quantities of developer and water. To increase the warmth, add bromide up to double the amount in the formula. The quantity of bormide specified in the formula, however, assures rich, warm, well-balanced tones.

From Ansco Formulas for Black and White Film by GAF, 1948 – Formulas are provided for historical reference.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