Method to extract silver from a photographic developer

摘要

This invention concerns the developing of silver halide photographic products. Silver-laden slurries accumulate in developing baths. It is possible to eliminate these silver-laden slurries by placing the developing baths in contact with aluminosilicate polymers modified by sulfur groups. For example, a tank 12 is fitted with a loop to feed the bath through a cartridge 16 that contains the elements 18 that are permeable to the developing bath, and which contain the aluminosilicate polymer modified by the sulfur groups.