Red.

Red. Most of the important red pigments have been already noticed. For carmine and crimson lake prepared from cochineal, and also for the madder reds, see LAKES. The reds of which oxide of iron is the colouring ingredient—viz. Indian red, Venetian red, and light red—are referred to under OCHRES. Vermilion (q.v.) is one of the finest and most beautiful reds. It has now been ascertained, however, that it is not always quite so permanent, at least as a water-colour pigment, as was formerly supposed. For house-painters' use this colour is often adulterated with red lead, which, though forming a useful paint for some common purposes, is fugitive. The substances used for dyeing textile fabrics red are noticed under the head DYEING.