What type of film can I use to produce an enlarged duplicate negative?
A. The most accurate and flexible duplicate negatives are made using the two-step interpositive/duplicate negative process. Basic instructions are available in the section “Making black-and-White Interpositives and Black-and-White Duplicate Negatives” in Kodak publication M-1, Copying and Duplicating: Photographic and Digital Imaging Techniques. With the elimination of Kodak’s and Agfa’s color separation films, there is no film on the market specifically designed to produce the long and accurate tonal scales required of duplicate negatives for POP printing. Currently, we recommend that interpositives be made on Kodak T-Max 100 Film, developed in T-Max developer. This combination of film and developer is capable of producing very accurate interpositives. Duplicate negatives exposed from the interpositives can also be produced on T-Max, however their size is limited to 8×10″, the largest factory-stocked size for this film. Larger sizes will require purchasing a product such as “Pan Portr
