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Non-poisonous Silvering Fluid

Nitrate of silver, 80 parts; dissolve in distilled water, 36 parts; add sal-ammoniac, 40 parts; 3599. Gruene's Method of Gilding and Silvering Silk. By a formula published by Gruene, for silvering or gilding silk, the silk is to be soaked with a 5 per cent. solu- hyposulphite of soda, 160 parts; and lastly, tion of iodide of potassium, and dried; then whiting, 160 parts. Apply in the usual way. (in non-actinic light, see No. 3140), dipped in 3606. Silver Plating Fluid. Dissolve a 5 per cent. solution of nitrate of silver, con- 1 ounce crystals of nitrate of silver in 12 ounof nitrate of silver in 12 ountaining a few drops of nitric acid, and well ces soft water. Then dissolve in the water 2 drained; next exposed for a few minutes to ounces cyanide of potassium. Shake the sunlight, and then dipped in a 2 per cent. so- whole together and let it stand till it becomes lution of sulphate of iron. It immediately be- clear. Have ready some half-ounce phials, comes gray, from reduction of metallic silver, and fill them half full of Paris white, or fine and, after washing and drying, only requires whiting, and then fill up the bottles with the burnishing in order to acquire the metallic liquid, and it is ready for use. The whiting lustre. By repeating this treatment, varied, does not increase the coating power; it only however, by adding a little free iodine to the helps to clean the articles, and to save the silclean the articles, and to save the sil solution of iodide of potassium, the silver de- ver fluid by half filling the bottles. This is posit becomes stronger. By laying the silver- the preparation commonly vended by pedpreparation commonly vended by peded silk in a very weak solution of chloride of dlers. of dlers. 3607. Silver Solution for Plating gold, the silver becomes chloride, and gold is deposited; and by then removing the chloride Copper, Brass, and German Silver. Cut of silver by a solution of hyposulphite of soda, washing, drying, and burnishing, the appear ance of gilding is produced, if the deposit of metal be sufficiently thick. The purest chermicals must be used in all gilding processes, in order to secure satisfactory results. into small pieces a twenty-five cent piece, and put it into an earthen vessel with ounce nitric acid. Put the vessel into warm water, uncovered, until it dissolves. Add 1/2 gill of water and 1 tea-spoonful of fine salt, and let it settle. Drain off and repeat, adding water to the sediment until the acid taste is all out of Next procure a weak solution of nitrate of the water. Add finally about 1 pint of water silver, place it in a flat dish or saucer; the face to the sediment, and 4 scruples cyanide of po- of the wood must now be dipped in this solutassium. Put into the solution a piece of tion, and let it remain a few minutes to allow zinc about 2 inches long, 1 wide, and 1/80 in capillary attraction to draw it into the wood. thickness. After cleaning, immerse the article This operation being performed, a small porto be plated in the solution about half a min- tion of the solution of phosphorus must be ute, letting it rest on the zinc. Wipe off with placed in a capsule or watch-glass, and this a dry cloth and repeat once. Polish with placed on a sand-bath, that it may gradually buckskin. The thickness of plate can be in- evaporate. The wood must now be held with creased by repeating.