ABC Plus Pyro -- Rollo Pyro -- is a formula developed by Harold Leban specifically for rotary processing in Jobo® equipment or BTZS® tubes. Thanks to Carl Weese for his painstaking testing and allowing us to use his information in our instruction sheets. The testing was done on several hundred negatives under a wide range of lighting conditions, being developed in Jobo® Expert drums. The results were clean negatives that can be processed in fairly short times at a relatively low (70°F) temperature in a single batch of chemistry. This formula however does not perform well in tray development because it produces a strong silver image with very little stain.
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