Abstract
The volume of wool was measured with a gas pycnometer, and its density was calculated. Samples with a high degree of medullation, low degree of medullation, and no medullation were measured at five relative humidities and over a range of masses. The procedure adopted required a sample mass of between 2 and 10 g and used the fourth sequential measurement of volume to calculate density at 65% relative humidity and 20°C. The total measurement time per sample was 10 minutes. Density decreased as the degree of medullation increased. Non-medullated wools had a density of 1.307 g/cm3.
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