Heico Perma-Wash 1 Gallon - Black & White Film & Paper Pre-Wash Solution (Makes 44 Gallons) | Professional Photo Developing, Darkroom Processing, Film Preservation

Perma Wash is a highly concentrated neutral liquid that not only saves a tremendous amount of time and wash water, but even more importantly provides archival permanence in both films and paper. A one quart bottle will make 11 gallons of working solution. Perma wash saves more than 90% of normal wash water requirements which is estimated that the operating costs is one cent per 8x10 sheet of film or paper processed. Perma Wash is non-corrosive and is formaldehyde free.