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Sulphate of Baryta, called bary- pigment

It can be obtained of different tos and constant white, is very permanent, of tints. It is, however, especially useful in a bluish tint; has no body in oil, but is a good fresco and silicious painting. white in fresco, silicious, and water-color 2704. Venetian Red, as now prepared, painting. Chemically it has no action on is an iron red; but, whether from adulteration other colors, and is not itself affected by any or not, it contains lime; and, as it is made ordinary destructive agent. It is a natural from the sulphate of iron, sulphate of lime product, called heavy spar. gets formed, and this prevents its employment 2698. Pfundheller's ller's Method of Ob-in silicious painting, for with silicate of potash taining Barytes White. For each 100 a silicate of lime is immediately formed, and pounds of wool, 3 pounds alum, 1 pound cream it becomes hard and lumpy. It may be used of tartar, and 2 pounds sulphuric acid are to in oil, water, and fresco.