Answer:
The mean fibre diameter of angora down fibres is around 12 to 14 m and the fibre length is up to 60 mm. The density of the fibre is 1.14 g/cm3, and hence lighter than wool (density: 1.33 g/cm3). The Angora rabbit hair is considered to be the easiest fibre to identify under microscope than other specialty fibres.
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