Name Amon First

Aristotype

As it is a Printing-Out Paper process, exposure occurs through contact with the negative in a printing frame, producing a print with identical dimensions to the negative. Before washing, the print is fixed and then toned, usually in a gold chloride bath. Self-toning papers were sold later in the market.

Aristotypes offer very good definition as well as warm tones which vary from red to purplish-brown depending on the type of toning and the nature of the binder used in the preparation of the emulsion. Various binders can be used in the production of the emulsion for this process. While it is often possible to identify binders by examining visually the print, in some cases, such as with hybrid processes, the identification of the binder may require further scientific analysis. The two main types of aristotypes take their names from the two most frequently observed binders in collections, namely collodion and gelatin.

The first, the collodion aristotype, was marketed from 1865 as a result of the work of A. Gaudin who developed the first positive colloidal silver emulsion, otherwise known as celloidin paper.

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