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Wool Dyeing Volume 1 download ebook

Wool Dyeing Volume 1 download ebook

Wool Dyeing Volume 1. Walter Myers Gardner

Wool Dyeing Volume 1
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Author: Walter Myers Gardner
Number of Pages: 62 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781130580709
Download Link: Wool Dyeing Volume 1
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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. 1896 Excerpt: ... gallons) being by no means rare. Any such quantity as this would, of course, exert a great effect in many dyeing operations, but fortunately its action, if injurious, can be neutralized by adding the corresponding amount of sulphuric acid. The presence of free alkali may be detected by means of a suitable indicator, such as red litmus paper, phenol phthalein, etc., and the amount estimated by titration with or acid, after 10 100 evaporating the water to small bulk in order to precipitate any carbonate of lime, etc., which is removed by filtration. LEAD AND COPPER IMPURITIES. Salts of these metals are of much less frequent occurrence than calcium, magnesium, or iron compounds, although if present they are equally objectionable. Lead may be detected by evaporating i litre of water to about 50Cc., adding a few drops of acetic acid and then passing sulphuretted hydrogen gas through the solution, a brown coloration being obtained if lead is present. If a little potassium ferrocyanide (yellow prussiate) solution is added to the concentrated water, a brownish-red coloration indicates that copper is present. neglected, since the amount of lime present would constitute but a fraction of the amount added in setting the vat; other impurities are also without action. Even in this case, however, the washing off, after cleansing with acid, should certainly be done with soft water. EFFECT OF WATER IMPURITIES DURING VARIOUS DYEING, ETC, OPERATIONS. In discussing the influence exerted by these substances it will be convenient to take the processes in the order in which they are practically employed. The first to be considered will therefore be (a) Wool Scouring.--When soap is one of the scouring agents employed, the use of water containing calcium or magnesium salts in not...

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