Photographer's Formulary TD-16 Film Developer, is an Improved D-76 formula, formulated to duplicate working characteristics of Kodak D-76 developer precisely.
D-76 is probably the most popular black and white developer in the world. 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.
They have worked out a proprietary modification of D-76 that maintains all its desirable working characteristics over a period of six months.