Ilford ID-4

Pyro film developer

Part A
Water 125F/52C750ml
Metol4g
Potassium Metabisulfite12g
Pyro12g
Cold water to make1000ml
Part B
Water750ml
Sodium Carbonate (monohydrate*)87g
Cold water to make1000ml
Mixing Instructions: Add chemicals in specified sequence.
Dilution: Mix equal parts A + B.
Usage: 

Notes 

*multiply amount by 0.833 if using Sodium Carbonate in anhydrous form.