It is common practice to renew solutions in the photographic processing machines by the use of replenishment system. This replenishment technique is quite effective and essential method in order to maintain the good and constant photographic image qualities, but has the defect of wasting the chemicals for processing. Calculations of reasonable replenishment rate and replenisher formulas are discussed following Goldwasser's report and applied to an example of dichromate bleach solution. Considering the degree of utilization of chemical, (i. e. the ratio of the chemical used up directly to react with photographic film to that overflowed from tank and drained), and applying the calculations of utilization degree to the actual processing data with replenishment technique, very low percentages of utilization of chemicals are obtained.