“ Vermilion is a permanent pigment, and may be used with water or oil, but cannot be used in enamel, as it volatilizes at a red heat. It possesses great body, weight, and opacity. Numerous pigments consisting of aniline colors thrown on a lead body, such as the oxide or carbonate, have largely taken the place of the true vermilion as a pigment, especially as they have a permanent red color, stand exposure fairly well, and change to a lighter color with age instead of a darker, as is the case with vermilion. ”