South African Wool and Textile Research Institute (SAWTRI) Collection
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The South African Wool and Textile Research Institute (SAWTRI) was established in Grahamstown in the early 1950's upon the inactive of the South African wool board. This followed the recommendation of Professor J.B Speakman (Professor of Textile Science at Leeds University) who was invited to study the possibility of organizing a wool research facility in South Africa to look after the textile research and development needs of both the wool procedure and growing wool and textile manufacturing industry of South Africa.
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Item Advances in the mordant bleaching of Karakul. Part 1: The effect of different reducing agents when mordanting with ferrous sulphate(1987-06) Bereck, A; Trollip, NGAn 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 processes using ferrous sulphate.Item An analytical study of the point of rupture of two-fold wool worsted yarns(1973-02) Hunter, LThe 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.Item The application of a more rapid dyeing technique to the chrome dyeing of wool(1978-02) Roberts, MBIn 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.Item The application of the etters diffusion equation to the rates of absorption of chromium by dyed and undyed wool(1983-11) Maasdorp, APBA simple diffusion equation has been successfully used to monitor the initial fast absorption of chromium by both dyed and undyed wool.Item Aspects of the shrinkproofing and bleaching of wool(1968-04) Becker, J; Swanepoel, OAThe 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.Item Assessment of the spinning potential on the short staple system by the MSS technique. Part 1: An introductory study(1984-08) Thierron, WThe Mean Spindle Speed at Break (MSS) test was developed at SAWTRI for assessing the spinning potential of wool on worsted ring spinning machines.Item An attempt to quantify the effect of staple crimp on the measurements of the length characteristics of wool tops on the almeter(1978-02) Turpie, DWFThe 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.Item Autoclave setting of wool yarn Part I: A study of the effect of setting on the rates of exhaustion of certain dyes(1975-10) Van Rensburg, NJJThe 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.Item The autoclave steam-curing of cotton fabrics treated with various aminoplast resins(1977-09) Du Plessis, M; Van Rensburg, NJJCotton fabric treated with aminoplast resins can be cured in an autoclave steamer, provided that the samples are sealed in aluminium foil or cooking bags.Item The automatic determination of the twist in single wool worsted yarns(1973-07) Hunter, LThe 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.Item The bending properties of some Punto-di-Roma wool fabrics(1981-11) Delaney, PSeventeen wool lots, varying greatly in physical properties, were processed into Punto-di-Roma fabrics.Item 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(1976-08) Hunter, LThe 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.Item 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(1976-12) Hunter, L; Gee, EThe 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.Item Bleaching of 55/45 wool/cotton blend fabrics. Part I: Using hydrogen peroxide(1976-03) Leigh, RAThe 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 all-cotton fabrics bleached under identical conditions.Item Bleaching of 55/45 wool/cotton blend fabrics. Part II: Using sodium chlorite and various reducing agents(1977-08) Barkenhuysen, FA; Leigh, RAThe bleaching of a 55/45 wool/cotton blended fabric with sodium chlorite and various reducing agents was investigated.Item The bleaching of cotton with emulsions of hydrogen peroxide in perchlorethylene medium(1972-08) Van Rensburg, NJJCotton can be successfully bleached with emulsions of hydrogen peroxide in perchlorethylene by single step batch application.Item The bleaching of wool with hydrogen peroxide in the presence of a phosphonic acid as stabilising agent(1971-09) Van Rensburg, NJJWool can be bleached successfully with hydrogen peroxide in the presence of an organic phosphate acid derivative.Item Blending of two cottons differing widely in fibre properties(1976-05) Aldrich, VTwo 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.Item Bulk resistance to compression as a measure of the crimp of staple synthetic fibre(1984-06) Hunter, L; Leeuwner, L; Smuts, SThe 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.Item Carding and combing of mohair Part III: Rectilinear combing(1969-04) Kruger, PJThe formula sued for determining the percentage fibre breakage on the Noble comb was not suitable for rectilinear combing.