Page:Cyclopedia of Painting-Armstrong, George D (1908).djvu/421

Rh durable in both water and oil, and does not injure other pigments when mixed with them. The same may be said of yellow ochre, a natural-colored clay, which does not lose its color when mixed with lime, and hence it is well adapted for distemper painting. Mixed greens are not so durable as those direct from copper, arsenic, etc., which are, however, injurious to health. Emerald green made of verdigris and a solution of arsenious acid, and Scheele's green and Vienna green, arsenites of copper, are very poisonous.

Durable Limewash. For one barrel of color wash, $1/2$ a bushel of white lime, 3 pecks of hydraulic cement, 10 pounds umber, 10 pounds ochre, 1 pound Venetian red, and $1/4$ pound lamp-black. Slake the lime, melt the lamp-black with vinegar, mix well together, add the cement, and fill the barrel with water. Let it stand twelve hours before using, and stir frequently while putting it on. This is not white, but of a light stone color, without the unpleasant glare of white. The color may be changed by adding more or less of the colors named, or other colors. This wash covers well, needing only one coat, and is superior to anything excepting oil paint.

Enamelling a Bath. To remove the dirt and grease from a bath, make a strong lye of soda, say 2 pounds of soda to a pail of water, and well scrub it out with this. Then rub it well down with pumice-stone or glass-paper, then wipe out all the dust. To make a good job it will want three coats of enamel. After giving the first coat let it stand for a day, after it is dry, before applying the second, and let it be two days between the second and third coats, to allow it to get thoroughly dry, a very essential point.

Enamelling upon Glass. This is a German method for enamelling glass: A mixture of dry enamel, thick pine oil, and damar lac is laid on the glass in a semi-dried state. After drying the drawing is pressed in. The enamel is then burned. In this way it is possible to reproduce the forms