Determining Raw Cashmere Fibre Micron Profiles in Scoured Bales
Determining raw cashmere fibre micron profiles in scoured bales requires core sampling, lipid extraction, and truncated bimodal histogram distribution analysis.
IWTO-10
Standard Protocol
A standardized testing protocol established by the International Wool Textile Organisation regulates the measurement of wool fibre diameter using a projection microscope. This standard, designated as iwto-10, provides the primary reference method for certifying the average fibre thickness of a commercial lot. Because fiber diameter is the single most important factor in wool pricing, this procedure underpins the international trade of raw fleece.
The standard is accepted globally as the final arbiter in cases of dispute between buyers and sellers.
Laboratory Execution
Technicians prepare thin cross-sections of the wool fibres and mount them on slides for magnified viewing. According to the iwto-10 protocol, the operator measures several hundred individual fibres to compute a statistically sound mean. This manual method requires calibrated equipment and trained eyes to distinguish between wool and other organic matter.
Commercial Significance
Spinning mills rely on the micron measurements certified under this protocol to set up their drafting zones and yarn counts. When the wool is thicker than the contract limit, it cannot be used for fine suiting fabrics.
Precision Margin
The method is highly reliable but time-consuming compared to automated airflow or optical devices. For this reason, it is primarily used to calibrate other high-speed testing instruments.