The mixing of opaque white gouache with transparent watercolor; or gouache colors in general.
an opaque water-soluble pigment, also known as gouache. “Watercolor†drawings are usually some combination of transparent pigments (watercolor) and opaque ones. An excellent example of the use of body color is A Woman Seated in Profile, Facing Right, by James Jacques Joseph Tissot. In 1834, the paint manufacturers Winsor and Newton introduced Chinese White, or zinc oxide, which was marketed as a substitute for lead white. Chinese White was used in a layer over the pink paper in Two Peasants, by Camille Pissarro. Renoir used lead white in A Woman Seated by a Lake, though the white has oxidized and is now black.
The color of light transmitted through a gem, as distinguished from key color, the color of refracted light.
The color of a diamond as observed when examined under a diffused light against a hueless background free from surrounding reflections. The diffused light eliminates glaring reflections and dispersion, which would otherwise confuse the color determination.
The examination of a diamond, by an experienced eye, under consistent lighting, against a white background, and checked against "master" diamonds.
This is the background color of the opal (not the color of the "flashes"); and is described as being from white, to gray, to black.
The background tone of the stone, also called base color.
The color of a gemstone as caused by transmitted light as opposed to reflected light.
The basic color of a pearl. White, cream, black, etc.. Always consider the overtones, orient and luster when evaluating a pearls color.
The color of the material, given for product classification purposes, in the nozzle manufacturer's catalog (mainly refers to products made of plastic). Colors are not shown for nozzles made of metal.
