There seems to be some confusion as to the formula for FX-2. This is not surprising, since often there are different versions of a developer, and often they are copied incorrectly. With no guarantees of accuracy, here are the three variations I have in my files:
Crawley FX-2 high acutance film developer
Metol 250 mg
Glycin 750 mg
Sodium sulfite (anh) 3.5 g
Potassium carbonate (xtal) 7.5 g
Pinacryptol yellow (1:2000) 3.5 ml
Variation (FX-2K) (provides enhanced midtones)
Metol 250 mg
Glycin 750 mg
Sodium sulfite (anh) 3.5 g
Sodium metaborate 10.75g
Variation (Experimental variation for superfine grain)
Metol 188 mg
Glycin 188 mg
Sodium sulfite (anh) 2.63g
Sodium metaborate 5 g
Sodium chloride 30 – 60 g