Wool Grower Services
SGS offers both on-farm and laboratory-based sampling and testing services that help wool traders, farmers and processors to make better-informed decisions.
We provide wool measurement data on the diameter and length of wool, for example, and also offer:
- On-farm fleece testing
- Laboratory fleece testing
- Weighing and sampling on-site
- Certification for pre-sale auctions and private sales
- Test reports for private sales
Responding to the growing demand for on-farm individual animal testing, our trained operators work on-site at shearing or pre-shearing. Operating under tightly-controlled conditions, we get the measurements you need for flock improvement or objective classing with the portable OFDA2000 length-diameter instrument.
In terms of wool sales and lab-based tests, we have services covering both trading certification and greasy wool testing. These rely upon sampling that complies with the regulations of the International Wool Textile Organization (IWTO).
We can also provide laboratory fleece testing as an independent and accredited service, giving growers the data required to select animals for culling or breeding. Growers and breeders simply send in fleece samples selected from individual animals (e.g. sheep, goats, alpaca) and we turn the results around quickly and cost-effectively.
For more information on our fleece testing and other wool grower services, contact SGS now.Email us
Wool Testing About Us (166 KB)
Wool Testing About Us
Wool Testing Services has been operating in New Zealand as an independent wool quality certification body for over 40 years.
On Farm Fleece Testing (92 KB)
On Farm Fleece Testing
On farm testing may give some growers more flexibility in the way they manage their flocks.
Alpaca Testing (127 KB)
Alpaca testing is performed by our accredited Timaru fleece testing laboratory or by our licensed OFDA2000 operators.
Possum (178 KB)
SGS has contributed to the commercial development of possum fibre by improving or modifying a number of test methods in order to characterise the fibre for yarn and fabric producers.
Mohair (119 KB)
SGS laboratories play their part, with mean fibre diameter, yield, medullation, kemp and fibre length being the most common test requirements.
Mean Fibre (253 KB)
Mean Fibre Diameter Testing
Mean fibre diameter is normally the most important determinant of raw wool price (Info-bulletin 3.1). Until recently, it was mostly certified using the airflow method detailed in IWTO-28.
Fibre Diameter Distribution (132 KB)
Fibre Diameter Distribution
There has been rapidly increasing interest in diameter distribution data, which is of potential interest to the quality of spinning, as well as indicating the comfort characteristics of apparel wools.
Diameter Length Profile (123 KB)
Diameter Length Profile
The average fibre diameter at increments along the length of wool staples may be important for managing sheep flocks, and in the future may assist in predicting processing performance.
Fibre Curvature (114 KB)
Fibre curvature or crimp of a fibre has a second-order effect on spinning performance.
Staple Length & Strength (163 KB)
Staple Length & Strength
Staple strength indicates how a wool will survive the rigours of processing. Staple length is directly related to combing length, and this therefore is one of the primary specifications.
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