![]() Solution A is a Metol (Elon) solution that is a low contrast developer and Solution B is a Hydroquinone solution that is a high contrast developer. There have been many developers that use a two bath technique for paper development. My answer to your question was directed to developing film. Since you posted your question in the B&W Photo - Film & Processing Forum, I made the assumption you were asking about film processing, and your question does not indiciate you are asking about developing prints. (I wonder if the chemistry has changed all that much since 1950?) SOURCE: Better Prints - Camerette Photo Library Volume E, published by The Camera Magazine, 1950 The process is repeated until the desired tone is reached in the highlights when the print may be transferred back to the developer to bring up the shadow areas to the desired strength" It is then given another quick dip in the developer and again shifted into the water tray. It is then drained and placed in a developer until the image starts to become visible, whereupon it is immediately transferred to the water tray and allowed to continue developing until the action seems to have stopped. After the paper has been exposed, it is placed in a tray of plain water and allowed to soak for a few moments until saturated and limp. "The process of water development is useful in reducing contrasts and building highlight detail without blocking up the shadow areas. In fact, I have read something along the same lines for paper development too: Paul, the first theory is the one proposed by the book. ![]()
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