Adox has announced the return of FX39.
The formula was originated by Geoffrey Crawley. FX39 is a one shot developer designed to be used at high dilutions for Delta and T-grain films. It was formulated for sale by Paterson, but they dropped it.
“If grain is too fine, light scatter in the negative increases when a negative is enlarged, reducing edge contrast.” — Crawley
39 Is Not 37
The formula for FX39 is proprietary, but Geoffrey Crawley published a close cousin, FX37.
FX 37 fully exploits Phenidone’s speed enhancing properties. For most
films, true speed is a half to two-thirds of a stop more than the
|Sodium Carbonate (anhy)||5||g|
|Borax (Sodium Borate)||2.5||g|
|Benzotriazole , 1% Solution||5||ml|
|Distilled water to make||1000||ml|
Dilute 1:3. Dilute 1:5 for longer developing times and increased film speed.