A light-tight container used for developing film. A developing tank allows photographic film to be developed in a daylight environment. This is useful because most film is panchromatic and therefore can not be exposed to any light during processing. Depending upon the size and type, a developing tank can hold one to many roll or sheet films.guidtofilmphotography
A light-proof container used for processing exposed film.
Chemical ingredients of a developer that convert all the exposed silver halides into black metallic silver.
A lighttight container used for processing film.