This developer is formulated to duplicate working characteristics of Kodak D-76 precisely. It offers optimum balance of speed, fine grain, high sharpness and good gradation. One important way TD-16 differs from D-76 is consistent results. The ph of D-76 can rise considerably, and contrast is greatly increased. We have worked out a proprietary modification of D-76 that maintains all its desirable working characteristics over a period of six months.