3785. Moire Bronze

3785. Moire Bronze. A moire appearance, vastly superior to that usually seen, is produced by boiling the object in a solution of sulphate of copper. According to the proportions observed between the zinc and the copper in the composition of the brass article, so will the tints obtained vary. In many instances it requires the employment of a slight degree of friction with a resinous or waxy varnish, to bring out the wavy appearance characteristic of moire, which is also singularly enhanced by dropping a few iron nails into the bath.

3786. French Bronze

3786.     French Bronze. An eminent Parisian sculptor makes use of a mixture of 1/2 ounce sal-ammoniac, 1/2 ounce common salt, 1 ounce spirits of hartshorn, and 1 imperial quart of vinegar. A good result will also be obtained by substituting an additional 1/2 ounce sal-ammoniac, instead of the spirits of hartshorn. The piece of metal, being well cleaned, is to be rubbed with one of these solutions, and then dried by friction with a clean brush. If the hue bo found too pale at the end of 2 or 3 days, the operation may be repeated. It is found to be more advantageous to operate in the sunshine than in the shade.

3787. To Bronze Copper with Sulphur

3787.    To Bronze Copper with Sulphur. When objects made of copper are immersed in melted sulphur mixed with lampblack, the objects so treated obtain the appearance of bronze, and can be polished without losing that aspect.

3788. Antique Bronze

3788.     Antique Bronze. Dissolve 1 ounce sal-ammoniac, 3 ounces cream of tartar, and 6 ounces common salt, in 1 pint hot water; then add 2 ounces nitrate of copper, dissolved in 1/2 pint water; mix well, and apply it repeatedly to the article, placed in a damp situation, by means of a brush moistened therewith. This produces a very antique effect.

3789. Antique Bronze

3789.    Antique Bronze. Rub the medal with a solution of sulphuret of potassium, then dry. This produces the appearance of antique bronze very exactly.

3790. Bronzing Liquids for Tin Castings

3790.    Bronzing Liquids for Tin Castings. "Wash them over, after being well cleaned and wiped, with a solution of 1 part sulphate of iron, and 1 part sulphate of copper, in 20 parts water; afterwards with a solution of 4 parts verdigris in 11 of distilled vinegar; leave for an hour to dry, and then polish with a soft brush and crocus.

3791. To Bronze Iron Castings

3791. To Bronze Iron Castings. Iron castings may be bronzed by thorough cleaning (see No. 3G41) and subsequent immersion in a solution of sulphate of copper, when they acquire a coat of the latter metal. They must be then washed in water.

3792. Surface Bronzing

3792.    Surface Bronzing. This term is applied to the process of imparting to the surfaces of figures of wood, plaster of Paris, etc., a metallic appearance. This is done by first giving them a coat of oil or size varnish, and when this is nearly dry, applying with a dabber of cotton or a camel-hair pencil, any of the metallic bronze powders; or the powder may bo placed in a little bag of muslin, and dusted over the surface, and afterwards finished off with a wad of linen. The surface must be afterwards varnished.