2576. To Dye Silk or Wool Magenta

2576.     To Dye Silk or Wool Magenta. Sufficient water to cover, without difficulty, the fabric to be dyed, is brought to a temperature of about 170° Fahr. ; a sufficient quantity of the dye is added, and followed by the immersion of the goods, which should be moved about to prevent streaks. About half an hour's immersion is sufficient. Half an ounce of the crystals should give a fair shade to 10 pounds of wool. A bath of soap-suds is sometimes employed instead of water, and by the use of alkali, brighter, but perhaps less permanent colors are produced. Acids render the shade dull and bluish.

2577. To Dye Cotton Magenta

2577. To Dye Cotton Magenta.

Place the cotton in a bath of sumach (1 pound sumach to 10 pounds cotton) for 2 hours. "Wring out, and dye in the same manner as wool. (See previous receipt.) A brighter shade is given by dissolving 1/2 ounce soap in hot water, letting the solution cool to 90°, adding 21/2 ounces olive oil, and mixing with tepid water. In this 5 pounds of cotton may be worked for about 5 minutes. A bath containing 1/4 pound sumach and 1 ounce tin crystals is next prepared, through which the cotton should be passed, wrung out, and finally dyed in a bath of magenta and pure water.

2578. Aniline Cerise and Safranine

2578.    Aniline Cerise and Safranine. These colors resemble magenta in appearance, and appear to be varieties of that substance. They are readily soluble in alcohol, and more or less so in water. The colors produced are similar to those obtained from safflower, but possess greater vivacity and permanence. The shades are exceedingly delicate and beautiful, inclining to pink with a shade of yellow. The dye bath is prepared, and the fabric dyed, in the same manner as magenta. (See Nos. 2575 (To Prepare Magenta for Dyeing), etc..)

2579. To Dye Aniline Yellow

2579.    To Dye Aniline Yellow. This color is slightly soluble in water, and for dyers' use may be used directly for the preparation of the dye bath. It is, however, preferably prepared in a liquid state, by dissolving 1 pound of dye in 2 gallons of alcohol. (See No. 2575 (To Prepare Magenta for Dyeing).) Without any addition to the dye bath very good yellows may be produced, but the color is much improved and brightened by a trace of sulphuric acid. The temperature of the bath should be under 200° Fahr.

2580. Schiff's Aniline Yellow

2580.    Schiff's Aniline Yellow. This matter, according to Schiff, is easily prepared by means of hydrated antimonic or stannic acid. Stannate of soda or other alkaline anti-moniate or stannate is to be pounded with half its weight of aniline to a clear pulpy consistence, then hydrochloric acid is added till the acid reaction takes place. It is then shaken up, and the scarlet color removed by etherized alcohol, the mass being, of course, previously dried. After proper purification it is allowed to evaporate spontaneously, and in this way are formed flakes of a hydrochlorate, having for base a red coloring matter, which must not bo confounded with rosaniline. When this hydrochlorate is decomposed by alkalies, deep yellow flakes are deposited, which again become red in presence of acids. By impregnating silk or wool with this red color, and then passing it into a hot solution of carbonate of soda, a beautiful yellow tint is developed, similar to the yellow of picric acid, and which M. Schiff claims to possess considerable stability.