2660. Lilac

2660.     Lilac. Dissolve crude oxide of cobalt in nitric or muriatic (hydrochloric) acid; add sesquicarbonate of ammonia, in excess ; afterwards sufficient ammonio-sulphate of copper to produce the color required. Filter. (See No. 2648 (Druggists' Show Colors).)

2661. Olive

2661.    Olive. Dissolve equal parts by weight of sulphate of iron, and oil of vitriol, in water; add sufficient nitrate of copper to produce the color. Filter as in No. 2648.

2662. Orange

2662.     Orange. A solution of bichromate of potassa in water, either with or without the addition of some hydrochloric or sulphuric acid. Or: Dissolve gamboge or annotto in liquor of potassa; dilute with water and add a little spirit. Filter these as directed in No. 2648.

2663. Sea Green

2663.      Sea Green. To 1 gallon water add acetate of copper, 4 drachms; and acetic acid, 4 ounces.

2664. Pea Green

2664.    Pea Green. To 1 gallon water add nickel, 2 drachms; acetic acid, 1 ounce; and bichromate of potash, 1/2 drachm. Or: To 1 gallon diluted alcohol, add sulphate of copper and common salt, of each 2 ounces.

2665. Light Blue

2665.    Light Blue. To 1 gallon of water add sulphate of copper, 16 ounces.

2666. Light Green

2666.    Light Green. Sulphate of copper (re-crystallized), muriatic acid (free from iron), water, alcohol, of each a sufficient quantity.

2667. Violet to Purple

2667.    Violet to Purple. To the green acid solution of sulphate of chromium add strong solution of ammonia, and filter as directed in No. 2648.

2668. Yellow

2668.    Yellow. Bichromate of potassa, muriatic acid, water, of each a sufficient quantity.

2669. Bright Red

2669.    Bright Red. Cochineal, ground, 1 ounce. Boil with 1 pint of water, replacing that which evaporates. Towards the close add cream tartar, 1/2 ounce; alum, 1 ounce; and when cold, oil of vitriol, 1 ounce, mixed with 1/2 pint of water.

2670. Purple to Pink

2670.    Purple to Pink. Fuchsine diluted with spirit, as desired.

2671. Magenta, Solferino, Water of the Nile

2671.    Magenta, Solferino, Water of the Nile, and other bright colors may be obtained by mixing the various aniline or tar colors with water as directed in No. 2497.

2672. To Prevent Show Colors Freezing

2672. To Prevent Show Colors Freezing. It will be sufficient to bring the solution to a strength of about 15 to 20 per cent, of alcohol. Naturally the liquids must be very dilute as regards the solids, so as to suffer no precipitation of any saline matter by cold or spirits. Acetate of copper, with or without ammonia, a dilute solution of iodine in iodide of potassium, nitrate of cobalt, etc., are not acted on by weak alcohol. "We believe that glycerine may be mixed with water for this purpose, but whether it possesses any superiority over alcohol we have not been able to ascertain. The bottles in all cases must have sufficient space left over the fluids to allow for expansion.