Abstract
Miniature wool bales of about normal packing density (approximately 16 lb/ft3 on a greasy-wool basis) were constructed from burr-free greasy wool with burr added in such a way that the true over-all burr content was known. These were sampled with a range of pressure-coring tools differing in size. Except when small coring tools were used in bales of high burr content, there was no significant difference between the mean burr content of several core samples from a miniature bale and the true over-all value for that bale. It is concluded that the act of pressure-coring does not distort the burr content of a sample and that the sample is therefore suitable for determination of clean-wool content. The between-core variance of burr content decreases as the size of coring tool increases.
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