3817. Larkin's Bronzing Fluids for Alloys of a Silvery-Grey Color

3817.    Larkin's Bronzing Fluids for Alloys of a Silvery-Grey Color. Mr. Larkin states that, for the purpose of rendering alloys which are of a silvery-grey color, perfectly suitable as substitutes for copper, bronze, brass, and other metals, the color proper to the metals which they are intended to substitute is imparted to them by means of any solution of copper. The hydro-chlorate of copper is found to answer best, and is employed as directed in the five following receipts.

3818. Directions for Using Larkin's Bronzing Fluids

3818.    Directions for Using Larkin's Bronzing Fluids. In either of these methods of coloring, a solution of sal-ammoniac may be substituted for the liquid ammonia. The quantities of each ingredient have not been stated, as these depend upon the nature of the alloy, the shade or hue desired, and the durability required. The bluish-bronze color may bo superadded to the red or copper color, whereby a beautiful light color is produced on the prominent parts of the article bronzed, or on the parts from which the blackish-bronze color may have been rubbed off. These new alloys may be used as substitutes for various metals now in general use, such as iron, lead, tin, or copper, in pipes and tubes; and bronze, brass, and copper, in machinery and manufactories, as well as for most of the other purposes for which more expensive metals are employed.

3819. Blackish Bronze Coloring

3819. Blackish Bronze Coloring. For giving silvery-grey alloys a blackish-bronze color, they are treated with a solution of hydrochlorate of copper diluted with a considerable quantity of water, and a small quantity of nitric acid may be added.

3820. Lead or Copper Coloring

3820. Lead or Copper Coloring. To impart a lead or copper color, add to the solution of hydrochlorate of copper, liquid ammonia and a little acetic acid. The salt of copper may be dissolved in the liquid ammonia.

3821. Antique Bronze Coloring

3821.     Antique Bronze Coloring. To impart a brass or antique bronze color, either of the three following means may bo adopted :- A solution of copper, with some acetic acid. Or:- The means before described for copper color, with a largo proportion of liquid ammonia. Or :- Water acidulated with nitric acid, by which beautiful bluish shades may be produced. It must be observed, however, this last process can only be properly employed on the alloys which contain a portion of copper.

3822. Drab Bronze for Brass

3822.    Drab Bronze for Brass. Brass obtains a very beautiful drab bronze by being worked in moulders' damp sand for a short time and brushed up.

3823. To Make Bronze Powder for Plaster Casts, etc.

3823.     To Make Bronze Powder for Plaster Casts, etc.. To a solution of soda-soap in linseed oil, cleared by straining, add a mixture of 4 pints sulphate of copper solution, and 1 pint sulphate of iron solution, which precipitates a metallic soap of a peculiar bronze hue; wash with cold water, strain, and dry to powder.