The Technical Testing of Yarns And Textile Fabrics
The Technical Testing of Yarns And Textile Fabrics
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(a) Determination of Water. A weighed quantity of the fabric is dried at 100 C. Until the weight ceases sensibly to decrease. The weighings must be performed in tightly closed glass vessels, the dried fibres being very hygroscopic. The difference between the first and final weighings gives the amount of water ; when this is comparatively large a high degree of weighting may be suspected, since starch absorbs much more water than the pure cotton fibre.
(b) Determination of the Extraneous Substan...ces. A weighed and thoroughly dried piece of the fabric, about 10 sq. In. In size, is treated at boiling heat with malt extract, washed, . Dried and weighed, the loss in weight being that of the extraneous matter. As a few insoluble soaps may be left behind, the sample is boiled for a short time in dilute acid, and reweighed after drying.
After this it is necessary to ascertain the nature and 1 Depierre, Appretur der Baumivollegewebe, p. 439.
DETERMINATION OF THE DRESSING. 153 quantity of the various dressing materials, to which end the fabric is boiled for several hours in water, whereby starch, gum, and all thickening materials, together with the soluble salts and the earthy bodies, are loosened from the fibre.
What to read after The Technical Testing of Yarns And Textile Fabrics?
You can find similar books in the "Read Also" column, or choose other free books by J Jacob Herzfeld to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
(a) Determination of Water. A weighed quantity of the fabric is dried at 100 C. Until the weight ceases sensibly to decrease. The weighings must be performed in tightly closed glass vessels, the dried fibres being very hygroscopic. The difference between the first and final weighings gives the amount of water ; when this is comparatively large a high degree of weighting may be suspected, since starch absorbs much more water than the pure cotton fibre.
(b) Determination of the Extraneous Substan...ces. A weighed and thoroughly dried piece of the fabric, about 10 sq. In. In size, is treated at boiling heat with malt extract, washed, . Dried and weighed, the loss in weight being that of the extraneous matter. As a few insoluble soaps may be left behind, the sample is boiled for a short time in dilute acid, and reweighed after drying.
After this it is necessary to ascertain the nature and 1 Depierre, Appretur der Baumivollegewebe, p. 439.
DETERMINATION OF THE DRESSING. 153 quantity of the various dressing materials, to which end the fabric is boiled for several hours in water, whereby starch, gum, and all thickening materials, together with the soluble salts and the earthy bodies, are loosened from the fibre.
What to read after The Technical Testing of Yarns And Textile Fabrics?
You can find similar books in the "Read Also" column, or choose other free books by J Jacob Herzfeld to read onlineMoreLess
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