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To Dye Straw Hats Black

The following is given as a black color for straw hats. The quantities of material are intended for 25 hats or bonnets. They are kept for 2 hours in a boiling decoction of 4 6340. To Remove Nitrate of Silver pounds logwood, 1 pound sumach, and 5 oun- Stains from Woven Tissues. According ces fustic; and afterwards dipped into a soto M. Grimm, chloride of copper completely lution of nitrate of iron of 40 Baumé, then removes, even from colored woven cotton well rinsed with water, and, when dry, are tissues, stains occasioned by nitrate of silver; painted over with a solution of lac or dexthe tissue is to be afterwards washed with a trine. tion, and not warmer than 70° Fahr., so as not to penetrate the leather. solution of hyposulphite of soda, and next 6350. To Dye Leather Yellow. Picthoroughly washed with water. From white ric acid gives a good yellow without any cotton and linen tissues, nitrate of silver mordant; it must be used in very dilute solustains are more readily and effectually removed by applying dilute solution of permanganate of potassa and hydrochloric acid, fol- 6351. To Dye Leather Green. Anilowed by washing with hyposulphite of soda line blue modifies picric acid to a fine green. solution, and rinsing in plenty of fresh water. In dyeing the leather, the temperature of 850 By these means the use of the highly poisonous cyanide of potassium is rendered unnecessarv. (See Nos. 385 and 3141).