Notebook

Notebook, 1993- MATERIALS & METHODS - Pigments

Drying Effect

Some pigments containing lead, cobalt, and manganese act as catalysts on the drying of oxidizable oils. Prussian blue, a ferric ferro-cyanide, also accelerates drying, while zinc white, vermilion, and others retard the drying process. Painters must bear this in mind when they intend to paint wet-in-wet for long, and they may even have to replace fast-drying pigments with others. There are, of course, other cases where fast drying may be desirable. This catalytic action has little effect on the drying of emulsions. [p. 65]

[Wehlte, Kurt. The Materials and Techniques of Painting. Translated by Ursus Dix. New York: Van Nostrand Reinhold Company. 1975.]

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