If they are not found and removed prior to further processing, they have the potential to damage machinery. This can result in a loss of value of the finished products if a contaminant - such as baling twine - is incorporated into the material.
Addressing the problem requires that both farmers and shearers have a higher level of awareness of what is happening in the shearing shed and ensuring that they have processes and checks in place to prevent anything but wool (and, in bin bales, newsprint for separation) going into wool bales.
The sector has developed a number of initiatives to help solve this problem. One of these was the development of a presentation and related resources by Cavalier Woolscourers.
Another is the development, by the Federation, working in partnership with the New Zealand Shearing Contractors Association, of the Keep Calm and Shear On poster.
This resource is designed to be put up in shearing sheds and provides key messages about how to prevent wool contamination.
An electronic copy of the poster can be obtained from Sarah Crofoot, the Federation's Meat & Fibre policy advisor.
Contact Sarah by email scrofoot@fedfarm.org.nz or telephone: 04 494-9195 or 0800 FARMING (0800 327-646).