Push processing refers to intentionally over-developing a roll of film to allow the formation of additional density in the emulsion of the film. It can be accomplished by either increasing the time or the temperature during the formative development step. Pull processing refers to intentionally under-developing a given roll of film, i.e. giving it less time (or a lower temperature) than is recommended. Push and pull processing has become very popular with the new generation of film users, who enjoy experimentation and want unusual, even unpredictable results.
Original image, left; with 'push' processing, right. |
Original image, left; with pull processing, right. |
Hobby and art photographers often make use of push/pull processing to intentionally create unusual variations in color and saturation. Push processing is associated with higher contrast than you would get by processing film at its rated speed; conversely, pull processing tends to decrease contrast. In black and white, push processing tends to be particularly evident in the graininess of the image; where this texture is sought after, push processing may be called for.
Many photographers combine pull processing with cross-processing. Since cross-processing tends to increase contrast, this can be compensated for by pulling the film. The reason you would do this is to take advantage of the distinctive color casts of cross-processed film without all of the contrast of cross-processing.
Many photographers combine pull processing with cross-processing. Since cross-processing tends to increase contrast, this can be compensated for by pulling the film. The reason you would do this is to take advantage of the distinctive color casts of cross-processed film without all of the contrast of cross-processing.
It is important to note that different brands and speeds of film show entirely different results to the same temperature/time alterations. For instance, a roll of Kodak Ektachrome 100 and a roll of Fuji Velvia 100 show wildly different color and saturation when cross-processed to the same formula.
120processing.com will be happy to push/pull your film; the option costs $2.00 per stop. We can go up to three stops push, and two stops pull. (We do not recommend either extreme, but we do offer it!) Please clearly mark ‘push’ or ‘pull’ on the order form.
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I accidently overexposed my film by 3 stops. About how much time should I take off for developing it? Normal developing time Rodinal 1+100 30 minutes @68f
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