Page:Cyclopedia of Painting-Armstrong, George D (1908).djvu/423

Rh varnished and moderately heated in an oven. Leaf gold may be applied in the same way.

Glass Window Writing. To mix colors: Mix dry fine colors with clear varnish or linseed oil, turpentine, and driers, also dry colors, gold size, and turpentine. By using dry colors a good body is obtained. As to background, use quick drying varnish and dry colors or gold size and turpentine, these will dry quickly. Rich brown: 2 parts black, 1 part yellow, 3 parts red, 3 parts turpentine, 1 part oil, a little gold size, and drier. Olive color: 16 parts lemon chrome, 2 parts Prussian blue, 2 parts lamp-black, 3 parts turpentine, to 1 part oil, driers, and gold size. For black letters get as much black as required, and mix with gold size and turpentine, turpentine mostly, to required thickness. Any other color can be treated in the same way. For background use pure white lead, and mix with maple varnish and turpentine, for cream color stain with lemon chrome and yellow ochre in oil and stipple with a new brush. Do not paint letters and background same day, or they will work into one another.

Green or Golden Color for Brass. The pleasing green or golden color generally to be found on the cheap and light brass articles of French manufacture can be easily produced at but trifling expense by the following means: $1 3/4$ ounces of caustic soda and $1 1/2$ ounces of milk sugar are dissolved in $1 3/4$ pints of water and boiled for a quarter of an hour. The solution is as clear as water at first, but gradually acquires a dark yellow color. The vessel is next taken from the fire, placed on a wooden support, and $1 1/2$ ounces of a cold concentrated solution of blue vitriol stirred in. A red precipitate of suboxide of copper is at once formed, and by the time the mixture cools to 167° Fahrenheit the precipitate will have settled. A suitable wooden sieve is placed in the vessel, and in this the polished articles are laid. In about a minute the sieve is lifted up to see how far the operation has gone, and at the end of the second minute