Testing statistics 2015/2016
Summary of wool testing statistics for 2015/2016
South Africa Accreditation System
ETB is accredited to ISO.IEC by the South Africa Accreditation System (SANAA-Lab noT020). SANAS is a recognized international organization and has signed Mutual Recognition Agreements with a number of other international accreditation bodies such as Chinese National Laboratory (CNLA) China, international Accreditation (IANZ) New Zealand and National Association Authorities (NATA) Australia. This overcomes international trade barriers and eliminate the need for international re-testing.


IWTO is the international body representing the interests of the world’s wool-textile trade and industry. IWTO membership covers wool growers, traders, primary processors, spinners, weavers, garment makers and retailers of wool and allied fibres in its member countries, as well as all kind of organizations related to wool products and the wool business in general. WTB Certificates are issued in accordance with the requirements of the International Wool Textile Organization ( IWTO) under License no.05.
International Wool Textile Organization


WTB is also a member of interwoollabs (IWL) which aims to develop co-operation between member laboratories to ensure the most correct and uniform application of IWTO test methods.


WTB is a proud member of the Inter-laboratory Round Trial Group (ILRT) and actively participate in international trials providing accurate and precise testing. The members represent the largest independent wool testing laboratories in the world, and are collectively responsible for the testing of approximately 40% of the worlds greasy wool production, and in excess of 80% of all greasy wool tested.

Inter-laboratory Round Trial Group


There are numerous wool producers throughout the country breeding with Merino sheep. The clip is tested by Objective Measurements which is an integral part of the preparation, marketing and processing of wool.

The first stage of testing is that the bales in the wool stores are grab sampled to obtain a display, sample which is also used for length and strength tufts, thereafter the bales are accurately weighed to determine the mass of greasy wool. A core sample is also taken from each bale in a lot, before being sealed in a plastic bag with the sample identification.

Objective Measurements is the determination, by means of scientific methods, of clean wool content, vegetable matter and mean fibre diameter of greasy wool (Additional Measurements).