I know the formula for FX-39 is proprietary, but can anyone comment on its basic make-up? I am seeing some reference to PQ formulation. How does it compare to Kodak TMax developer?
Mark,
ADOX FX39-II and Kodak T-Max developer are very different:
FX39-II is designed for
- having very good sharpness / acutance
- having semi-compensating or compensating capability (strength is dependent on film and developer dilution)
- being very versatile and flexible in working with different dilutions (best results mostly with 1+9, 1+14, 1+19 and 1+24), that makes it more easier to get the characteristic curve shape you need = optimised tonal values
- being "low(er)-tox", and can be shipped easily internationally
- very easy handling
- because of the (semi)compensating effect too dense highlights can be avoided if a 1-stop push is needed (works not with all, but with several films)
- improved storage capability of the concentrate (with the current version "II").
T-Max and T-Max RS developer is designed for
- getting a bit more effective film speed than standard developers
- getting a linear characteristic curve shape with most films
- usage in prof. labs
- easy handling
- good long-term storage capability of the concentrate.
Best regards,
Henning