Variation in the whiteness and brightness of white Australian cashmere associated with farm of origin and fibre attributes

McGregor, B.A. 2012, Variation in the whiteness and brightness of white Australian cashmere associated with farm of origin and fibre attributes, Animal production science, vol. 52, no. 7, pp. 436-441.

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Title Variation in the whiteness and brightness of white Australian cashmere associated with farm of origin and fibre attributes
Author(s) McGregor, B.A.
Journal name Animal production science
Volume number 52
Issue number 7
Start page 436
End page 441
Total pages 6
Publisher CSIRO Publishing
Place of publication Collingwood, Vic
Publication date 2012-03-20
ISSN 1836-0939
1836-5787
Keyword(s) curvature
washing yield
wool
yellowness
Summary While white cashmere is preferred by processors, its whiteness and brightness is affected by country of origin, amino acid composition, nutrition and cashmere production of goats. This work aimed to quantify the factors which affect the whiteness and brightness of 36 batches of processed Australian white cashmere sourced from nine different farms. The cashmere was tested for tristimulus values brightness (Y) and whiteness, as measured by yellowness (Y-Z). Linear models, relating Y and Y-Z were fitted to farm of origin and other objective measurements. Mean attributes (range) were: mean fibre diameter, 16.9 µm (13.9–20.4 μm); fibre curvature, 45°/mm (31–59°/mm); clean washing yield, 91.3% (79.5–97.3%); Y, 78.7 (74.7–82.2); Y-Z, 11.9 (10.3–13.6). Farm alone accounted for 72% of the variation in Y and 65% of the variation in Y-Z (P < 0.001). Once farm had been taken into account only fibre curvature (P = 0.003) was significant in predicting Y and only clean washing yield (P = 0.047) affected Y-Z. Neither the proportion of the fleece present as guard hair (clean cashmere yield) nor cashmere staple length was a significant determinant of Y or Y-Z. For each 10°/mm increase in fibre curvature Y increased 1.3 units. For each 10% increase in clean washing yield Y-Z declined 0.9 units. Variations in Y and Y-Z among farms were probably related to differences in geographic and climatic conditions and were significantly correlated to cashmere production. The effect of clean washing yield was probably related to a reduction in suint content.


Language eng
Field of Research 091012 Textile Technology
Socio Economic Objective 830599 Primary Animal Products not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2012, CSIRO
Persistent URL http://hdl.handle.net/10536/DRO/DU:30049703

Document type: Journal Article
Collection: Institute for Frontier Materials
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