Abstract
An account is given of the use of a tracer-fibre technique to investigate the configuration, the mean radial position, and the contribution to hairiness of various typical blend components in purewool carpet yarns produced on three different spinning systems. Tracer fibres selected to represent the components of an ‘unimproved’ fleece were found to behave differently during spinning, both from each other, and from tracer fibres selected from ‘improved’ fleeces. The choice of spinning method (woollen, open-end, or semi-worsted) was found to have most effect on the arrangement of fibres near the surface of the yarns.

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