Tech Sheet
Safety Sheet

Technical Data

510 Pyro, formulated by Jay DeFehr, is an extremely fine grained, high acutance, long shelf-life
staining developer giving full film speed with most films and uniquely triple optimised for darkroom
silver gelatine printing, alternative UV based printing and scanning with the same development time.
510 Pyro is specifically designed for both modern T-grain and the conventional emulsions.
510 Pyro is for maximising sharpness with minimal grain – solving the traditional paradox of a tradeoff with sharpness and grain levels – full tonality particularly unrivalled highlight separation given by
the inbuilt variable contrast filter obtained from the stain, high micro-contrast and exceptional
enlargements exceeding x20.
510 Pyro is supplied as a liquid concentrate diluted for 1:100 one-shot use. However, it can be further
diluted for economy though there will be a reduction in image quality and longer development times.
Note: an acidic stop bath and hypo clear must not be used with 510 Pyro developed negatives as they
destroy the stain. A water stop bath is instead recommended. This developer is not compatible with
Bergger Pancro 400 due to the double emulsion