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Browsing South African Wool and Textile Research Institute (SAWTRI) Collection by Title

Browsing South African Wool and Textile Research Institute (SAWTRI) Collection by Title

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Advances in the mordant bleaching of Karakul. Part 1: The effect of different reducing agents when mordanting with ferrous sulphate

Author: Bereck, A ; Trollip, NG Date: Jun 1987 An investigation has been performed, the results of which provide evidence for the preferential use of phosphorus based reducing agents in place of the traditionally used sulphur based reducing agents in the first stage of mordant bleaching ... Read more
An analytical study of the point of rupture of two-fold wool worsted yarns

Author: Hunter, L Date: Feb 1973 The breaking strength and extension of a range of wool worsted hosiery and weaving yarns were related to the average linear density of the yarn segment and that of the yarn at the point of rupture. Read more
The application of a more rapid dyeing technique to the chrome dyeing of wool

Author: Roberts, MB Date: Feb 1978 In the chrome dying of wool by the afterchrome process, a saving of time has been achieved during the dyeing phase by commencing the dyeing at a higher temperature than normal and controlling exhaustion by means of a steady reduction in pH. Read more
The application of the etters diffusion equation to the rates of absorption of chromium by dyed and undyed wool

Author: Maasdorp, APB Date: Nov 1983 A simple diffusion equation has been successfully used to monitor the initial fast absorption of chromium by both dyed and undyed wool. Read more
Aspects of the shrinkproofing and bleaching of wool

Author: Becker, J ; Swanepoel, OA Date: Apr 1968 The production of whites and pastel shades in wool is complicated by the fibers' natural cream to yellow ground color and their tendency to yellow during certain processing operations. Read more
Assessment of the spinning potential on the short staple system by the MSS technique. Part 1: An introductory study

Author: Thierron, W Date: Aug 1984 The Mean Spindle Speed at Break (MSS) test was developed at SAWTRI for assessing the spinning potential of wool on worsted ring spinning machines. Read more
An attempt to quantify the effect of staple crimp on the measurements of the length characteristics of wool tops on the almeter

Author: Turpie, DWF Date: Feb 1978 The length characteristics of wool tops which had been produced from thirty different wools from a range of breeds were measured on the Almeter and compared with results obtained by the single fibre length method. Read more
Autoclave setting of wool yarn Part I: A study of the effect of setting on the rates of exhaustion of certain dyes

Author: Van Rensburg, NJJ Date: Oct 1975 The effect of autoclave setting of wool yarn on the rates of exhaustion of different types of wool dyes, namely the 1;1 metal complex, 1.2 metal complex, acid milling, acid levelling and reactive dyes, was investigated. Read more
The autoclave steam-curing of cotton fabrics treated with various aminoplast resins

Author: Du Plessis, M ; Van Rensburg, NJJ Date: Sep 1977 Cotton fabric treated with aminoplast resins can be cured in an autoclave steamer, provided that the samples are sealed in aluminium foil or cooking bags. Read more
The automatic determination of the twist in single wool worsted yarns

Author: Hunter, L Date: Jul 1973 The effect of wetting wool worsted yarns prior to testing on the twist values obtained by the double untwist-twist and untwist-retwist on tested on an automatic twist tester has been investigated. Read more
The bending properties of some Punto-di-Roma wool fabrics

Author: Delaney, P Date: Nov 1981 Seventeen wool lots, varying greatly in physical properties, were processed into Punto-di-Roma fabrics. Read more
The between bale and between lot variation of South African grown cottons. Part I: Micronaire, maturity, fineness, 2,5% span length, uniformity ratio and trash content

Author: Hunter, L Date: Aug 1976 The between-bale and between variations in micronaire, maturity ratio, 2,5 per cent span length, uniformity ratio and trash content have been determined for a wide range of cottons grown in South Africa. Read more
The between bale and between lot variations of South African grown cottons. Part II: Bundle tenacity and extension at 3,2 mm (1/8") gauge

Author: Hunter, L ; Gee, E Date: Dec 1976 The between-bale and between lot variations in the bundle tenacity and bundle extension have been determined on a Stelometer for a wide range of cottons grown in South African. Read more
Bleaching of 55/45 wool/cotton blend fabrics. Part I: Using hydrogen peroxide

Author: Leigh, RA Date: Mar 1976 The response of three 55/45wool/cotton blend fabrics to bleaching with peroxide by conventional cold-pad-dwell and pad-steam methods under both acid and alkaline conditions has been examined, and compared with the performance of all wool and ... Read more
Bleaching of 55/45 wool/cotton blend fabrics. Part II: Using sodium chlorite and various reducing agents

Author: Barkenhuysen, FA ; Leigh, RA Date: Aug 1977 The bleaching of a 55/45 wool/cotton blended fabric with sodium chlorite and various reducing agents was investigated. Read more
The bleaching of cotton with emulsions of hydrogen peroxide in perchlorethylene medium

Author: Van Rensburg, NJJ Date: Aug 1972 Cotton can be successfully bleached with emulsions of hydrogen peroxide in perchlorethylene by single step batch application. Read more
The bleaching of wool with hydrogen peroxide in the presence of a phosphonic acid as stabilising agent

Author: Van Rensburg, NJJ Date: Sep 1971 Wool can be bleached successfully with hydrogen peroxide in the presence of an organic phosphate acid derivative. Read more
Blending of two cottons differing widely in fibre properties

Author: Aldrich, V Date: May 1976 Two cottons differing by 4.2 mm in their 2.5 % span lengths (30.9 and 26.7mm) and by 6.1 cN/tex in their zero gauge bundle tenacities were blended and the resultant yarn and fabric properties measured. Read more
Bulk resistance to compression as a measure of the crimp of staple synthetic fibre

Author: Hunter, L ; Leeuwner, L ; Smuts, S Date: Jun 1984 The use of bulk resistance to compression of a randomized fibrous assembly, determined on a SAWTRI compressibility Tester,a as a measure of the crimp of staple synthetic fibres, has been investigated. Read more
Carding and combing of mohair Part III: Rectilinear combing

Author: Kruger, PJ Date: Apr 1969 The formula sued for determining the percentage fibre breakage on the Noble comb was not suitable for rectilinear combing. Read more

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