Dye toning procedures.

Dye toning is a term used for a wide range of procedures in which the original silver image is replaced by a coloured dye image, or is supplemented by dyes in addition to the silver. A look at any early textbook will show that a very wide range of techniques could be used, some of which are listed below. All are possible today using modern black and white print stocks as the starting point but as with the metallic or inorganic toning methods described above it is not definitely possible to be sure that the tones, hues and contrasts are the same as were produced with the old print stocks.