Page:Willich, A. F. M. - The Domestic Encyclopædia (Vol. 3, 1802).djvu/126

108&#93; loSl LI .NT LIN" and permanent bl;ick : for diis pur- pose, we subjoin the t'oUowiat; ac- count, by M, VoGLEK, of Weil- barg. One quart of pure., soft water, is to be mixed in a large bottle, wntli two ounces, or two ounces and a half of common aqua- fortis ; to which a similar (juantity of litharge should be gradually added : the bottle, after being slightly cori !->e dved, should be well washed (lliongh not bleached), and imnnersLd in it for ten or twelve hours. It is then to be taken out, and, after being washed and rinsed three times in pure cold water, it ought to be dipped in a wt ak solu- ti(jn of common glue ; again rinsed, aiid then placed in the shade to dry. Three quarters of an ounce of galls, well bruiseJ, are now to be boiled in a (juart of rain, or other pure, soft water, for eigi.t or ten .minutfs, when a similar quantity of common salt is to be added ; and, as soon as the latter is dis- solved, the linen should be boiled in the. liquor for seven or eight minutes ; then taken out, washed, wrung three times as before, and dried in the shade. By these ope- rations, the stuff will imbibe a dark grey-yellowish tinge, that dis- p )ies it for llie better reception of the C(jlour. Three quarters of an ounce of copperas, or vitriol of iron, and a smnlar quantity of common salt, arc now to be tlissolved in a quart of pure, hot water, and the iiuen injmersed in the liquid for eight or tea hours ; when it must again be washed, rinsed, and suspended for drying in the shade. In order to strike the blaek co- lour, INI. VoGLEK nextdiretts three quarters of an ounce of logwood to be boiled for seven or eight mi- nutes, in somewhat more than two quarts of rain or river water, when a quarter of an ounce of white starch should be added, having previously been mixed with a small quantity of fresh water, to prevent the rising of lumps. As soon as this is perfeAly dissolved, the stuff ought to be boiled in the liquor for seven or eight minutes, after which it must undergo the same treat- ment as has been repeatedly speci- lied. The linen will thus acquire a fine blaek tinge ;. but, if the dye be not sufficiently deep, it may again be immersed in the deco6tion of logwood, and treated in the man- ner above stated, till the requisite shade be obtained. But as the stuffy in this state, will not admit of being washed in ley, or soap- water, A'itb- out losing its colour, ]M. Vogler farther dn-ecfs it to be dipped in a cold solution, prepared by boiling an ounce of galls, well bruised, for seven or eight minutes, in a quart of the glue-water, in which an ounce of copperas should then be dissolved. After the linen has re- mained one hour in this liquor, it must be pressed and dried in the shade: in consequence of these processes, it will acquire a beauti- ful and permanent black colour. A durable", but expensive, purple (Iijc may be communicated to li- nen, by immersing it in a solution of gold, in aqua-regia. — -For this purpose, the latter ought to be fully saturated with the metal, and be diluted with a triple quantity of water ; if a deep colour be ro- o^uived.