Zonal Pro Factor One Black & White Paper Developer, 16 Oz

Full tonal gradation, normal to high contrast levels Hue quotient is slightly neutral A high capacity Phenidone / Hydroquinone print developer.

State of the art formulation insures consistency from bottle to bottle. High concentration means maximum economy and convenience in handling, storage and mixing Compatibility with all modern emulsions means you no longer need to store separate solutions for graded and variable grade paper. Concentrates have a shelf life of up to two years.