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Woolcheque uses a combination of objective and subjective wool measurements and characteristics to price wool.
Objective measurements include diameter (micron), length, strength, position of break, vegetable matter and colour. AWEX-ID covers subjective characteristics.
Fibre diameter is responsible for between 70% and 80% of the greasy wool price over the long term.
Staple length generally determines the end use of wool, that is, whether it will be used in weaving or knitting. As with other wool attributes, the finer the wool the more sensitive is its price to any fault, including too short or overly long wool
Staple strength is a measure of the force required to break a wool staple of a given thickness, recorded as Newtons per kilotex (Nkt).
Position of break (POB) indicates where fibres are likely to break during processing and the length of the broken fibre sections. Processors prefer low mid-break wools.
Vegetable matter (VM) in wool is a disadvantage as its removal during processing can be costly. Depending on the severity and type of VM, wool may need to undergo additional processing.
Greasy colour is important to processors as only white product can be dyed to pastel shades, whereas off-coloured wool is restricted to darker colours.