2636. To Color Pickles and Sweetmeats Green

2636.    To Color Pickles and Sweetmeats Green. A beautiful green color, entirely destitute of any poisonous qualities, may be made by dissolving 5 grains saffron in 1/4 ounce distilled water, and in another vessel dissolving 4 grains indigo carmine in 1/2 ounce distilled water. After shaking each up thoroughly they are allowed to stand for 24 hours, and on being mixed together at the expiration of that time a fine green solution is obtained, capable of coloring 5 pounds of sugar.

2637. Chameleon Mineral

2637.    Chameleon Mineral. Mix equal weights of black oxide of manganese and pure potash, and heat them in a crucible. Keep the compound in closely-stoppered bottles. A solution of it in water passes through various shades of color from green to red.

2638. Cadmium Yellow Color for Soap

2638. Cadmium Yellow Color for Soap. The chemical works of Schering, in Berlin, have introduced two shades of sulphide of cadmium, a lemon and orange yellow, for the coloring of toilet soap. Of all the agents thus far tried to give a lively yellow color to soap, sulphide of cadmium (cadmium yellow) has proved the most permanent. Age and sunlight do not affect the color, and the quantity required is exceedingly small.

2639. To Color Soap Yellow with Cadmium

2639. To Color Soap Yellow with Cadmium. The cadmium yellow (see above) is rubbed up with oil, and added to the soap under constant stirring. The color is not dissolved in the soap, but suspended in it, and much depends upon careful mixing.

2640. Liquid Colors

2640.    Liquid Colors. The following, when thickened with a little gum, are used as inks for writing, as colors to tint maps, foils, paper, artificial flowers, etc., and to paint on velvet. Some of them are very beautiful. It must be observed, however, that those made with strong spirit do not mix well with gum, unless diluted with water.

2641. Liquid Blue

2641.    Liquid Blue. Dissolve litmus in water, and add i of spirit of wine. Or, dilute Saxon blue or sulphate of indigo with water. If required for delicate work, neutralize the acid with chalk. Or, to an aqueous infusion of litmus add a few drops of vinegar till it turns full blue.

2642. Liquid Purple

2642.    Liquid Purple. Steep litmus in water, and strain. Or, add a little alum to a strained decoction of logwood. Or, add a solution of carmine (red) to a little blue solution of litmus or Saxon blue.

2643. Liquid Green

2643.    Liquid Green. Dissolve crystallized verdigris in water. Or, dissolve sap green in water, and add a little alum. Or, add a little salt of tartar to a blue or purple solution of litmus, till it turns green. Or, dissolve equal parts of crystallized verdigris and cream of tartar in water, and add a little gum-arabic. Used as an ink for writing.