Name Amon First

Tirage au gélatino-chlorure d'argent

The shades of a chemically developed print that are naturally black can be changed by using different kinds of developers or by toning. The most popular toning from 1910 onwards is sepia toning, giving a brownish tone and a greater stability to the print.

The emulsions factory applied to a baryte base. The papers are used by contact with the negative as their low sensitivity does not allow enlargement. The size of the print is therefore the same as the negative, glass plate or medium or large size sheet film. The advantage of this process comes from the exceedingly file half-tone results and the excellent resolution that comes from this. The most widely used papers were sold under the Kodak Velox® (very often used for post card prints) or Gevaert Ridax® trade names. This kind of technology is often linked to quality production for professional applications in portrait studios or amateur use linked to expanding tourism in the early twentieth century. Although it progressively went out of use as small format cameras became the norm and contact printing became obsolete for amateurs, it was still seen in industrial photography until the 1950s.

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