A non phenidone based film developer yields negatives with unique clarity, high acutance and superlative low contrast gradation when used to process Technical Pan Film. 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 grainless 16 x 20" prints to be made. An average of 26 rolls of film can be developed with 10 liters. The shelf life of the stock solutions is one year, the working solution is used only once.