Part 182

Aniline Black Lake.—In the precipitating vat filled with 200 parts of cold water enter with constant stirring in the order mentioned the following solutions kept in readiness: Forty parts of alum dissolved in 800 parts of water; 10 parts of calcined soda dissolved in 100 parts of water; 30 parts of azo black dissolved in 1,500 parts of water; 0.6 parts of “brilliant green” dissolved in 100 parts of water; 0.24 parts of new fuchsine dissolved in 60 parts of water; 65 parts of barium chloride dissolved in 1,250 parts of water. Allow to settle for 24 hours, wash the lake three times and filter it.

«Carmine Lake for Wall Paper and Colored Papers.»—Ammonia soda (98 per cent), 57.5 parts by weight; spirits (96 per cent), 40 parts by weight; corallin (dark), 10 parts by weight; corallin (pale), 5 parts by weight; spirit of sal ammoniac (16° Bé.), 8 parts by weight; sodium phosphate, 30 parts by weight; stannic chloride, 5 parts by weight; barium chloride, 75 parts by weight. Dissolve the corallin in the spirit, and filter the solution carefully into eight bottles, each containing 1 part of the above quantity of spirit of sal ammoniac, and let stand. The soda should meanwhile be dissolved in hot water and the solution run into the stirring vat, in which there is cold water to the height of 17 inches. Add the sodium phosphate, which has been dissolved in a copper vessel, then the corallin solution, and next the stannic chloride diluted with 3 pailfuls of cold water. Lastly the barium chloride solution is added. The day previous barium chloride is dissolved in a cask in as little boiling water as possible, and the receptacle is filled entirely with cold water. On the day following, allow the same to run in slowly during a period of three-fourths of an hour, stir till evening, allow to settle for 2 days, draw off and filter.

«English Pink.»—

Quercitron bark 200 parts Lime 10 parts Alum 10 parts Terra alba 300 parts Whiting 200 parts Sugar of lead 7 parts

Put the bark into a tub, slake lime in another tub, and add the clear limewater to wash the bark; repeat this 3 times, letting the bark stand in each water 24 hours. Run liquor into the tub below and add the terra alba and whiting; wash well in the top tub and run into liquor below through a hair sieve, stirring well.

Dissolve the sugar of lead in warm water and pour gently into the tub, stirring all the time; then dissolve the alum and run in while stirring; press slightly, drop, and dry as required.

«Dutch Pink.»—

I.—Quercitron bark 200 parts Lime 20 parts Alum 20 parts Whiting 100 parts Terra alba 200 parts White sugar of lead 10 parts

II.—Quercitron bark 300 parts Lime 10 parts Alum 10 parts Terra alba 400 parts Whiting 100 parts Sugar of lead 7 parts

Put the bark into a tub with cold water, slake 28 pounds of lime, and add the limewater to the bark. (This draws all the color out of the wood.) Dissolve alum in water and run it into bark liquor. The alum solution must be just warm. Dissolve sugar of lead and add it to above, and afterwards add the terra alba and whiting. The product should now be in a pulp, and must be dropped and dried as required.

«Rose Pink.»—I.—Light.

Sapan wood 100 parts Lima 100 parts Paris white 200 parts Alum 210 parts {279}

II.—Deep. Sapan wood 300 parts Lima 300 parts Terra alba 400 parts Paris white 120 parts Lime 12 parts Alum 200 parts

III.—Sapan wood 200 parts Alum 104 parts Whiting 124 parts

Boil the woods together in 4 waters and let the products stand until cold; wash in the whiting and terra alba through a hair sieve, and afterwards run in the alum. If a deep color is required slake 12 pounds lime and run it in at the last through a hair sieve. Let the alum be just warm or it will show in the pink.

«DYES, COLORS, ETC., FOR TEXTILE GOODS:»

«Aniline Black.»—This black is produced by carefully oxidizing aniline hydrochloride. The exact stage of oxidation must be carefully regulated or the product will be a different body (quinone). There are several suitable oxidizing agents, such as chromic acid, potassic bichromate, ferrocyanide of potassium, etc., but one of the easiest to manipulate is potassic chlorate, which by reacting on copper sulphate produces potassic sulphate and copper chlorate. This is easily decomposed, its solution giving off gases at 60° F. which consist essentially of chloride anhydrate. But one of the most useful agents for the production of aniline black is vanadate of ammonia, 1 part of which will do the work of 4,000 parts of copper. Many other salts besides copper may be used for producing aniline black, but the following method is one of the best to follow in making this dye:

Aniline hydrochloride 40 parts Potassic chlorate 20 parts Copper sulphate 40 parts Chloride of ammonia (sal ammoniac) 16 parts Warm water at 60° F 500 parts

After warming a few minutes the mass froths up. The vapor should not be inhaled. Then set aside, and if the mass is not totally black in a few hours, again heat to 60° F., and expose to the air for a few days, and finally wash away all the soluble salts and the black is fit for use.

«Aniline Black Substitutes.»—I.—Make a solution of

Aniline (fluid measure) 30 parts Toluidine (by weight) 10 parts Pure hydrochloric acid, B. P. (fluid measure) 60 parts Soluble gum arabic (fluid measure) 60 parts

Dissolve the toluidine in the aniline and add the acid, and finally the mucilage.

II.—Mix together at gentle heat:

Starch paste 13 quarts Potassic chlorate 350 scruples Sulphate of copper 300 scruples Sal ammoniac 300 scruples Aniline hydrochloride 800 scruples

Add 5 per cent of alizarine oil, and then steep it for 2 hours in the dye bath of red liquor of 2 1⁠/⁠2° Tw. Dye in a bath made up of 1⁠/⁠2 ounce of rose bengal and 1 1⁠/⁠2 ounces of red liquor to every 70 ounces of cotton fabric dyed, first entering the fabric at 112° F., and raising it to 140° F., working for 1 hour, or until the desirable shade is obtained; then rinse and dry.

«Blush Pink on Cotton Textile.»—Rose bengal or fast pink will give this shade. The mordant to use is a 5 per cent solution of stannate of soda and another 5 per cent solution of alum.

Dissolve in a vessel (a) 8 1⁠/⁠2 parts of chloride of copper in 30 parts of water, and then add 10 parts chloride of sodium and 9 1⁠/⁠2 parts liquid ammonia.

In a second vessel dissolve (b) 30 parts aniline hydrochlorate in 20 parts of water, and add 20 parts of a solution of gum arabic prepared by dissolving 1 part of gum in 2 parts of water.