AUTOMATIC PROCESSING DEVICES FOR PROCESSING PHOTOGRAPHIC MATERIALS

摘要

An automatic film processing device replenishment system where an infra red sensor (6) is located to measure silver content of the image on a film or paper carrier, and use the measured silver content for control of replenishment of the process chemicals. In a preferred arrangement a first infra red sensor (6) measures silver content and controls replenishment of developer (1) and bleach (2), and a second infra red sensor (11) measures silver halide content and controls replenishment of fixer (3).