Quality Guarantee
International certificates issued by laboratories following the regulations of the International Wool Textile Organisation provide definitive data on raw wool lots. The iwto blue certificate represents a specific type of test result where the laboratory itself takes responsibility for the sampling process. This document is the highest level of certification available for grease wool traded on the global market.
Sampling Custody
Independent technicians must visit the warehouse and supervise the core boring of the bales to ensure no tampering occurs. To issue an iwto blue certificate, the laboratory must follow strict protocols for sample identification and transport. This chain of custody ensures that the results on the paper accurately represent the physical goods stored in the bales.
The data usually includes vegetable matter base and mean fiber diameter.
Commercial Usage
Buyers in the top making and spinning industries require these documents to calculate the price per kilogram of clean wool. An iwto blue certificate reduces the financial risk associated with impurities and moisture variation in natural animal fibers. Because the sampling is independent, the certificate is accepted by banks and insurance companies as an accurate valuation of the asset.
Laboratory Standard
Only facilities that pass regular round robin trials and maintain accreditation are permitted to issue these official results.