Agfa/Ansco 70

[nworth]

Lately, several people have asked for formulas for lith developers. I came across this classic formula for an A-B type lith developer:

Agfa/Ansco 70
Process film developer

Stock Solution A
Water 750 ml
Hydroquinone 25 g
Potassium Metabisulfite 25 g
Potassium Bromide 25 g
Cold water to make 1 L

Stock Solution B
Cold Water 750 ml
Sodium Hydroxide 36 g
Cold water to make 1 L

Mixing instructions: Add chemicals in specified sequence. When mixing, due to the risk of heat reaction, make sure to dissolve sodium hydroxide (or potassium hydroxide) in cold water only.

Dilution: Mix equal parts A+B immediately before use.

Starting point development time: 3 mins.

Notes: 50 grams of Potassium Hydroxide can be substituted for the 36 grams of Sodium Hydroxide specified in this formula.