THEIR NATURE AND QUALITY.
We will begin with gall-stone, which is one of the finest and brightest in the world, and it very lasting color, although in face painting it should be sparingly used, its wonderful brilliancy being apt to drown all the other colors, and make the work it is used in too warm in its tints.
Of Terra Sienna, it is unburnt, a bright yellow-brown earth, and is used by some miniature painters as a warm yellow; but burnt it is a beautiful color, and partakes of three tints, yellow, red and brown.
Yellow Ochre is a bright yellow earth, and comes from France, is semi-opaque, and works well. Much used by artists, but must be used with caution. It is a lasting color, and of service in the fleshy face tints.
Roman Ochre is a reddish yellow earth of a very great body, and used by some with success in miniature painting. Used with gum water it works well, and being a warm color, it communicates that quality to the tints it is worked on.
Naples Yellow is an earth found near Naples, and is a soft, bright and durable color. A great proportion of that used is composed of lead, alum, sal-ammonia and antimony. This color is not very much used by artists, as it does not stand well. Is a pale, gritty yellow. It absorbs all colors that are worked on it or mixed with it.
Gamboge is the concrete juice of various trees in Ceylon—is a transparent color, and consequently useful as a glazing color.
Yellows have their base in iron, lead, quicksilver and arsenic.