Tag: Micron

A micron (micrometre) is the measurement used to express the diameter of a wool fibre. The lower microns are the finer fibres. Fibre diameter is the most important characteristic of wool in determining its greasy value.
Every fleece comprises a very wide range of fibre diameters—for example a typical Merino fleece will contain fibres of as low as 10 microns in diameter, and there could be fibres with diameters exceeding 25 microns, depending on the age and health (or nutrition) of the sheep. What is usually referred to as wool’s “micron” is the mean of the fibre diameters or average diameter. This may be measured in a number of different ways.
Small samples can be taken from the side or fleece of a sheep and measured using a portable instrument such as an OFDA2000 (Optical Fibre Diameter Analyser); or a mobile instrument system called a Fleecescan. Both these systems have been studied extensively and used correctly should give reasonably reliable results. Pre wool classing micron test…

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