Uniformity Measurement
Statistical distribution parameters define the dispersion of fiber thicknesses about the mean in a wool or cashmere lot. This specific value, known as the coefficient of variation of diameter, is expressed as a percentage of the average diameter. Lower percentages indicate a highly uniform fiber batch.
Spinning Efficiency
Uniform fibers process much more smoothly during the carding and drafting stages. Inconsistent batches with high variability lead to frequent yarn breakages on the spinning frame. Fewer breaks translate to higher machine productivity and lower processing costs for the mill.
Yarn Consistency
Irregularities in fiber thickness cause variations in yarn density and strength. When the coefficient of variation of diameter is kept low, the resulting yarn has a more uniform structure that resists breakage under tension. High yarn strength is critical for high-speed knitting machines.
This property directly affects the visual appearance of the finished fabric by reducing thick and thin spots.
Statistical Range
Laboratory standards like those from the International Wool Textile Organisation require precise calculation of this parameter using automated test equipment. The raw data comes from measuring thousands of individual fibers per sample. Spinning mills utilize these results to select appropriate fiber blends for specific yarn counts.
