A color varnish for sheet metals is made by powdering 7 1/2 drachms of acetate of copper in a mortar, spreading this powder in a thin layer upon a plate and allowing it to stand in a lukewarm place. In the course of a day or two the evaporation of most of the acetic acid and water of crystallization will have taken place. The residue of light brown powder is then to be triturated with oil of turpentine, into which there are stirred 3 1/2 ounces of high-grade fat copal varnish of a heat of 1.67 degrees Fahrenheit. If the rubbing of the acetate of copper has been thoroughly-performed the dissolution of most of it will be evaporated after 15 minutes' stirring. Then pour the varnish into a glass bottle, put it in a warm place and shake it often. The little amount of acetate of copper settling on the bottom can be used again for other portions of varnish. The color of this varnish is a dark green, and it takes 4 to 5 coats to produce a brilliant green luster on sheet metals. If a gold shade is desired 2 coats are sufficient. The article to be gilded being heated in a drying chamber or upon metal-plates which have been uniformly heated. The time of heating is the determinent of the resultant shade, which may be either green or yellow, dark yellow, orange or reddish-brown.