Kodak Technical Pan film was one of the most unique and unusual films ever manufactured. Mastering it's characteristics for a continuous tone image has proven quite difficult because it is in fact a high contrast line copy film by nature. Kodak produced a special continuous tone developer for Tech Pan called Technidol but in my opinion it never rendered a satisfactory negative for continuous tone photography. That is why I process Tech Pan with the "Selective Latent Image Manipulation Technique" or "SLIMT" developed by David Kachel. In this process the negative is pre-bleached in potassium ferricyanide prior to development. The negatives are simply extraordinary exhibiting virtually no grain and minimal speed loss. For full tone negatives ISO 25 is recommended but speed can be increased to ISO 100 with some loss of black detail. So if you still have a supply of this amazing film, try this process that will produce even more quality.