Paint Manufacturers' Association of the United States. Scientific Section · Philadelphia, PA : Paint Manufacturers Association, Scientific Section · leaf 641
INDIAN RED. Indian red is the term applied to natural hematite ore pigments and to those produced by the roasting of copperas (iron sulphate). They generally contain 95 per cent, or more of iron oxide, with varying percentages of silica. The pigment is heavier (specific gravity 5.2) than that of…
Paint · Painting, Industrial · Corrosion and anti-corrosives
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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