The use of egg white as a binder for paints was already documented in the High Middle Ages. From the time around 1100 the tract "De Clarea" has survived (Burgerbibliothek Bern, You are not allowed to view links. Register or Login to view.), which describes the use and mixture of egg binders (egg white and egg yolk) before listing the colors for which egg white was used as a binder.
Here is a Latin / German translation of the text:
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Here is a Latin / German translation of the text:
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