Cyclopedia of textile work Volume 6 ; a general reference library on cotton, woollen and worsted yarn manufacture, weaving, designing, chemistry and dyeing, finishing, knitting, and allied subjects - Softcover
Synopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 Excerpt: ...tints and compound shades, that are not easily matched. Prepare the dye bath as follows: Direct Cotton Color Common Salt Soap Enter the material at a temperature of 100 F or lower, into the dye bath containing the dyestuff and soap, and after working %-hour, add the proper quantity of common salt. Bring dye bath to a boil, and dye at a boil for one hour. Calcareous water should be corrected as in the second method before adding the soap. FOURTH METHOD. This method is the same as the third, except that sodium phosphate is used instead of common salt. General Notes. When especially deep shades are desired it often is advisable to boil for.'-hour and then work in the graduallv cooling bath for & to 1 hour, for by doing this the dyestuff is utilized to its fullest extent. Some dyestuffs have been found to dye as well or better when entered into the boiling dye bath instead of at a lower temperature. In some cases where a boiling dye bath is not desirable, the dyeing may be done at a lower temperature (160 to 180 F.), but this as a rule is not economical as regards the quantity of dyestuff used. With colors that are very fugitive to washing, the rinsing after dyeing is sometimes dispensed with, but dyeings finished in this way will not stand even the mildest washing without running. Notes on Dissolving Dyestuffs. It is far more convenient as well as safer to keep dyestuffs that are constantlv used, in solu. tion rather than in the dry powder state. In many works it is customary to keep large stock solutions on hand, generally so much color to the gallon, but for laboratory work the metric system is used, and a certain number of grams dissolved per litre. By using a certain volume of these solutions an exact weight of dyeatuff may be had without the necessity...
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