Abstract
Abstract The most important techniques of those currently used in Home Office forensic science laboratories for the analysis of fiber dyestuffs are thin-layer chromatography and visible absorption spectroscopy of dye solutions. To obtain useful discrimination 20 to 50 ng of each dye component must be extracted. In most fiber examinations the recovered fibers are between 2 and 10 mm in length and contain between 2 and 200 ng of dye, depending on the depth of dyeing. Consequently, dye extraction must be efficient if the techniques are to be applied in a reasonable proportion of cases involving fiber comparisons. This paper is concerned with the extraction of dyes from wool fibers.
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