Metol 4.5 g
Sodium Sulphite anhydrous 125.0 g
Sodium Metaborate (Kodalk) 2.25 g
Sodium Metabisulphite 1.0 g
Potassium Bromide 0.5 g
Water to 1 litre

FX5b Replenisher (for replenished tank systems)

Metol 7.0 g
Sodium Sulphite anhydrous 125.0 g
Sodium Metaborate (Kodalk) 25.0 g
Potassium Bromide 1.0 g
Water to 1 litre

Note : No Sodium Metabisulphite used in replenisher.

20% development time increase after first film until 4 or 5 films have been processed per 600 ml or 10% increase until 8 or 10 films have been developed in 1,200 ml. Use rep to maintain level of tank until 25 rolls per litre are processed.

Visual contrast is lower than the printing contrast. This formula gives true fine grain with good sharpness and the minimum loss of film speed (30-50%) necessary to achieve very fine grain. Results resemble those of the original two-powder pack "Microdol", found very suitable for Ilford films amongst others, although replaced in Kodak usage by the later formula "Microdol-X", giving improved definition on Kodak films.

Dev. Times. Mins. @ 20ºC (test!)

Pan F (35mm)=10
Pan F (120)=12
FP4 (35mm)=8
FP4 (120)=12
HP5 (35mm)=11
HP5 (120)=13