The PMK formula was developped by Gordon Hutchings, in order to create a universal developer, adapted to a wide variety of modern films, and to a wide range of shooting conditions.
The PMK formula allows to achieve the following characteristics :
sharpness of contours
yellow staining of the negative. Staining intensity depends on the reduced silver quantity
very low fog
stability of the stock solutions
An alkalin fixer, like BERGGER Berfix, is required to obtain the best negative stain, and the best stability in time.
PMK is delivered as two solutions that have a very long shelf life, if they are not mixed.
In standard dilution (1+2+100), the PMK kit allows the photographer to prepare 25 L of working solution.