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Comparative analysis of two selective bleaching methods on alpaca fibers

Liu, Xin, Hurren, Christopher J. and Wang, Xungai 2003, Comparative analysis of two selective bleaching methods on alpaca fibers, Fibers and polymers, vol. 4, no. 3, pp. 124-128.

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Title Comparative analysis of two selective bleaching methods on alpaca fibers
Author(s) Liu, Xin
Hurren, Christopher J.
Wang, Xungai
Journal name Fibers and polymers
Volume number 4
Issue number 3
Start page 124
End page 128
Publisher Korean Fiber Society
Place of publication Seoul, Korea
Publication date 2003-09
ISSN 1229-9197
1875-0052
Keyword(s) bleaching
dyeing
alpaca fiber
color
yellowness
hydrogen peroxide
fibre science
Summary Dark brown Alpaca fiber was reduced in shade via selective bleaching with peroxide. Two selective oxidative bleaching methods were tested on alpaca top to assess their effectiveness for color removal and fiber quality properties. Color change, bundle strength, weight loss, fiber diameter, surface modification, dye-ability and dye wash fastness were assessed for both methods and compared with the original brown top. Bleach method 1 (BL-I) showed little surface modification, 5.8 % weight loss and 2.4 % strength loss. D1925 yellowness index was reduced to 74.3 from 83.1 and provided a good base for the dyeing of medium to deep shades. Bleach method 2 (BL-II) displayed considerable surface modification, 7.8 % weight loss and 18 % strength loss. BL-II also resulted in a mean diameter reduction of 1.9 micron during bleaching. Yellow-ness was reduced to 64.5 from 83.1 and provided a very good base for the dyeing of medium to deep shades. BL-I showed better exhaustion of the pre-metallised dye Lanaset Violet B than BL-II. Wash fastness for BL-II was 1 grey scale unit poorer than BL-I. BL-II showed far better color clarity at pale depths however the wash fastness of the finished product was not good enough to maintain the depth or clarity of the color. BL-I showed poorer clarity of color but exhibited better wash fastness results.

Notes The original publication is available at springerlink.com.
Language eng
Field of Research 091012 Textile Technology
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30002204

Document type: Journal Article
Collections: School of Engineering and Technology
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