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Measuring colour and photostability of small fleece wool samples

journal contribution
posted on 2010-01-01, 00:00 authored by K R Millington, A King
A convenient method for measuring the clean colour (Y and Y-Z) and photostability Δ(Y-Z) of small samples of fleece wool (0.5 g) is described. Scoured wool samples are compressed to a constant density in disposable polymethyl methacrylate spectrophotometer cells and the wool colour is measured using a standard textile laboratory reflectance spectrophotometer. Packing scoured wool into cells ensures that the irradiated fibre surface is robust and individual fibres are unable to move relative to one another during irradiation and measurement. A UVB (280–320 nm) source was used to ensure all samples regardless of initial yellowness were yellowed following exposure and photobleaching was avoided. An apparatus capable of irradiating up to 48 scoured wool samples in one batch is described. The precision of photostability measurements was assessed and the relative error in Δ(Y-Z) was 5.7%. An initial study on 75 fleece wool samples with a high range of initial yellowness showed a moderate linear correlation (R2 = 0.68) between initial yellowness and Δ(Y-Z).

History

Journal

Animal production science

Volume

50

Issue

5-6

Pagination

589 - 592

Publisher

CSIRO Publishing

Location

Collingwood, VIC

ISSN

1836-0939

eISSN

1836-5787

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2010, CSIRO

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