One-shot developer for especially detail-rich and extremely sharp negatives. This developer is based on the Beutler Formula for Neofin Red, but was further developed by Geoffrey Crawley. Makes very good use of the film's full ISO-rating. It's possible to double the films ISO by adjusting the development times. FX39 can be used in various dilutions in order to develop low-sensitivity films with at least 6-minutes developing time. Especially good for films up to 200 ASA.
STANDARD DILUITION 1+9.
DILUITION 1+14: the time should be multiplied by 1.5
DILUITION 1+19: develop for twice as long as by standard dilution.