Sodium Sulphite Anhydrous 1.00 g
Paraformaldehyde 30.00 g
Potassium Metabisulphite 10.5 g
Water to 1 litre

Sol B

Sodium Sulphite Anhydrous 120.00 g
Boric Acid crystals 30.00
Hydroquinone crystals 90.00 g
Pot. Bromide crystals 6.00 g
Water to 3 litres

Working solution (for standard lith film processing) : 1 part A + 3 parts B

Typical Dev. time @ 20ºC : 2 mins.