Article (Scientific journals)
Dichroism measurements in forensic fibre examination: Part 5—Pigmented fibres
De Wael, K.; Lepot, Laurent
2012In Science and Justice: Journal of the Forensic Science Society, 52 (3), p. 161-167
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Keywords :
Dichroism; Pigments; Man-made fibres; Microspectrophotometry (MSP); Fibre examination
Abstract :
[en] A number of pigmented fibre samples were examined with plane polarized light on their dichroic behaviour by optical light microscopy (OLM) and microspectrophotometry with plane polarized light (MSP-PPL). It was found that about half of the samples show a strong dichroic effect and another 20% have a weak dichroism. Both regular (80%) and inversed dichroic effects (20%) occur. The dichroic characteristics of pigmented fibres can be compared to these of sheet polarizers. It is suggested that the dichroic behaviour of pigmented fibres depends strongly on the crystal structure (shape of the pigment grains) and the draw ratio (orientation of the polymer chains).
Disciplines :
Chemistry
Author, co-author :
De Wael, K.
Lepot, Laurent ;  Université de Liège - ULiège > Doct. sc. (chimie - Bologne)
Language :
English
Title :
Dichroism measurements in forensic fibre examination: Part 5—Pigmented fibres
Publication date :
September 2012
Journal title :
Science and Justice: Journal of the Forensic Science Society
ISSN :
1355-0306
Publisher :
Forensic Science Society, Harrogate, United Kingdom
Volume :
52
Issue :
3
Pages :
161-167
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 23 October 2012

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