Response to presoaking film

Developing times given in most of the literature always seem to give slight under development.Presoaking the film allows the gelatine to swell and become more readily absorbant therefore, the chemical is absorbed quicker and, starts to act quicker; the net result is that the film is developed more fully, giving better contrast. Care needs to be taken that the presoak is at the same temperature as all the other liquids.

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