FORMULARY TD-3 FILM DEVELOPER, formulated by Bill Troop is a unique film developer offered exclusively by Photographers Formulary. This developer, when used to process Kodak Technical Pan yields negatives with exceptional clarity, high acceptance, and superlative low contrast gradation. With TD-3 development there is a true increase in film speed of more than one stop when compared with most developers. The combination of Tech Pan film and TD-3 allows grain less 16x20 prints to be made. An average of 20 rolls of film can be developed with the small kit, 80 with the medium size kit and 120 with the large kit. The shelf life of the stock solutions is one year, the working solution is used only once. This developer may also be useful with other technical-type films.