Name Amon First

Aristotype

The first aristotype paper was marketed in 1867 by the Munich-born chemist Johann Baptist Obernetter. As the first industrial paper production process it offered many improvements to the practice of photography such as ease of use, because it was ready to use, increased sensitivity and better conservation, which quickly attracted amateur photographers. For all those reasons, during the 1880s this process gradually supplanted the use of albumen paper.

Aristotypes are composed by a three-layer process comprising a paper layer, a layer of baryum sulphate in gelatin and finally a layer of emulsion containing silver chloride suspended in a binder. The use of a baryta layer applied between the paper and the emulsion makes it possible to achieve purer whites and increases the brightness of the image. Being hidden by the baryta layer, the paper fibres are no longer visible.

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