Or dilute 1 part of acetic acid in 10 parts of water to make 2 pounds; add green verditer, 1 ounce; muriate of ammonia, ounce; common salt, 1 ounce; alum, ounce. Boil pound of French berries in a little water until the strength is extracted. Add this to the above mixture, bring to a boil, and strain.
Or, for olive brown, mix hydro chloric acid, 1 ounce; nitric acid, ounce. Add titanium or palladium as long as it dissolves. Strain, and add 3 pints of distilled water.
Or mix equal amounts of sal am moniac and salts of sorrel, and dis solve in vinegar. Dip the articles in the solution, or apply it with a brush, increasing the color by repeated dip pings or additional coats. The above may be applied to articles of copper, brass, bronze, or any other metal.
Bronze—Dark or Brown Shades.— Iron filings, 1 pound; arsenic, 1 ounce; metallic zinc, 1 ounce; hydro chloric acid, 1 pound. Dip the arti cles in this solution and repeat if nec essary. This gives a brown shade.
Or dissolve salts of copper in water and acidulate with nitric acid. This gives a blackish bronze.
Or digsolve salts of copper in liquid ammonia and acidulate with acetic acid. This gives a dark-red or cop per color.
Aniline Bronzing Fluid. — Two ounces of aniline red and 1 ounce of aniline purple dissolved in 10 ounces of 95 per cent alcohol. Dissolve with gentle heat in a double boiler. Add 1 ounce of benzoic acid and boil for 10 minutes, or until the greenish color of the mixture changes to a light bronze. This is a very brilliant bronze paint or varnish, which may be applied with a brush to all metals or other materials, and dries quickly.
Bronze Paint for Iron. — Chrome green, 1 pound; ivory black, I ounce; chrome yellow, ounce; japan, gal lon. Grind all together in linseed on. Mix the boiled linseed oil and apply with a paint brush.
Or to any black paint add sufficient chrome yellow to give a dark-green shade. Apply this with a brush, dry, and coat with a slow-drying varnish. When the varnish is tacky, dust on bronze powder through a cheese-cloth bag. Shake it over the varnish. Let dry, and cover with hard copal or other varnish.
To Bronze Gnn Barrels.—Put hy drochloric acid in an open earthen ware vessel, and feed in strips of zinc until the acid ceases to take them up. Evaporate this liquor with gentle heat until a drop on a piece of glass solid ifies on cooling. Cool and add 2 parts of olive oil for each 3 parts of the liquor. Clean the gun barrels. Warm
them with gentle heat, and apply this mixture with a piece of felt.
Bronze Powder—Red Bronze.—Sul phate of copper, 10 ounces; carbonate of soda, 6 ounces. Mix together with gentle heat, pulverize, and add ounces of copper filings. Mix, bring to a white heat, and keep it so N minutes. When cool, powder, wash on filter paper, and dry.
Gold Bronze.—Verdigris, 4 ounces; putty powder, 2 ounces; borax, 1 ounce; niter, 1 ounce; bichloride of mercury, ounce. Mix to a paste with boiled linseed oil and fuse. This mixture is used in japanning.
Cheap Gold Bronze.—Melt 1 pound of tin and add I pound of quicksil ver. Stir in 7 ounces of sulphur and 8 ounces of sal ammoniac, and pul verize.
Pure Gold Bronze.—Grind gold leaf to a powder in pure honey. Dilute with clear water and let the gold set tle. Pour off the water and repeat until the gold dust is clean.
Pure Silver Bronze.—Same as the above, but substitute silver leaf for gold.
Silver-white Bronze.—Melt togeth er 1 ounce of bismuth and 1 ounce of tin; add 1 ounce of mercury, cool, and pulverize.
Cheap Gold or Silver Bronze. Grind Dutch leaf to powder.
Iron-color Bronze. — Grind plum bago to powder.
Bronze for Plaster Casts. — Coat the casts in oil or glue size, and be fore they dry apply bronze powder by tapping it on with cotton wool or a camel's-hair brush.
Or hold the powder loosely in a piece of cheese cloth, and through this dust it over the surface. Rub smooth ly with a soft cloth. When dry, cover with copal varnish.
Bronze for Leather.—Aniline vio let mixed with a little water and ap plied with a brush gives a beautiful bronze luster.
To Bronze Paper.—Apply a size of glue or gum arable in water, and dust the powder over the surface.
Lettering may be done by dipping the brush in the size, lettering quick ly, and dusting on the powder before the size is dry.
Printing is done in the same man ner. Afterwards the letters should be burnished by going over them with et smooth flatiron as hot as can be without scorching the paper.
Bronze for Medals. — Mix crocus powder with water to a thin paste and apply with a brush. Afterwards heat the metal, and when cool polish. The depth of color depends upon the de gree of heat. Heat the metal over an open fire.
Or use powdered black lead in stead of crocus powder.
Or apply sulphuret of potassium.