Film development push processing

ASA films, such as Kodak Tri-X Pan for black and white prints or Ektachrome for color slides, are suitable for many applications. These films can be exposed at 800 or 1600 ASA and push-processed in a high-contrast developer. A combination that has found favor in many laboratories is that of Kodak Tri-X with the Diafine two-bath developer (1), which provides an ASA of 1600. In general, black and white film has a finer grain and is suitable in most situations, the exceptions being doublelabeling procedures in which both fluorophores are to be photographed simultaneously or the preparation of color slides for presentations. 

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