The Coal Tar Colours Of Farbwerke Vorm Vol 2

Author : Lucius Brüning Meister
Publisher :
ISBN 13 : 9781331953463
Total Pages : 218 pages
Book Rating : 4.9/5 (534 download)

DOWNLOAD NOW!

Download or read book The Coal Tar Colours of Farbwerke Vorm, Vol. 3 written by Lucius Brüning Meister and published by . This book was released on 2015-07-21 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Coal Tar Colours of Farbwerke Vorm, Vol. 3: Meister Lucius Bruning, Hoechst on Main, Germany and Their Application in Wool Dyeing The dyeing of woollen yarn is great important in the textile industry, and comprises a large field. The dyed yarns are employed for widely different purposes, and accordingly the demands as to fastness properties are very varied. Since the choice of suitable dyestuffs and the method of applying them depends principally upon the purpose for which the yarn is to be employed, we shall divide our discussion of yarn dyeing under the following heads: 1. Yarns for heavy milling. 2. Yarns for light soap milling. 3. Yarns for water milling. 4. Carpet yarns, yarns for upholstery goods and curtains. 5. Stocking yarns, yarns for hosiery, washing etc. 6. Yarns for fancy articles, knitting yarns etc. 7. Wool laces, woollen braids and bindings. 8. Yarns made from fine wools. The treatment of the yarn before dyeing. In order to produce level and fast colours on yarn, the first and principal requirement is again the purity of the goods. Since we have drawn attention to the importance of the washing of the wool when dealing with the dyeing of loose wool (Vol. II, page 7 etc.) we need only mention here that a bad and unsatisfactory wool-wash has a bad influence on the result in whatsoever stage of manufacture the dyeing takes place. This applies, therefore, also to wool yarn which, when manufactured from badly washed wool, dyes unevenly and yields results which are badly fixed and rub off. The yarns, after spinning, must be further cleansed: They must be "extracted," i. e. freed from those substances which have been added to facilitate the spinning operations. For worsted yarns, generally soap alone is used for this purpose, whilst for carded yarns and also different Cheviot yarns, oil, oleine and olive oil are employed. In most cases, for the better class combed yarns a treatment with hot water is sufficient, whilst carded yarns and many Cheviot and weft yarns containing a high percentage of fatty substances are first treated with alkali, and then the fatty compounds removed by washing in water. It is very difficult, in fact almost impossible, to cleanse yarns which have been spun with fats which do not saponify easily, or with mineral oil. The use of such products in spinning cannot be too strongly condemned, for the disadvantages consequent upon their employment are out of all proportion to the relatively small saving which accrues from the substitution of these substances in place of Oleine. Yarns which have been spun with soap only, such as the better class worsted yarns, zephyr yarns etc. are generally "steeped" in the bundle, i. e. they are placed in boiling water contained in a suitable vessel, and allowed to stay therein for several hours, generally overnight. This steeping serves a two-fold purpose. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works."