1851 - Circa. 1900s
The albumen process was introduced in France by Louis-Désiré Blanquart-Evrard.
A contact print on paper most often made from a collection negative. The paper was treated with a solution of albumen (egg white) and salt, then sensitized with silver nitrate.
The print was made by placing the paper in direct contact with the negative and exposing it to the sun.

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