Dew-Retted Heilongjiang Flax against Imported Water-Retted Bales
Dew-retted Heilongjiang flax provides cost savings for medium counts, while imported water-retted bales deliver the fineness needed for yarn counts above Nm 50.
Uster CV Irregularity
Variation Coefficient
Numerical representation of the mass variations along a specific length of yarn or sliver indicates the consistency of the spinning process. Calculated as the coefficient of variation of the mass, uster cv irregularity is measured by an electronic capacitance tester that monitors the strand as it passes through a sensor. This value is a primary determinant of the visual appearance and quality grade of the finished linen fabric.
Quality Assessment
High levels of mass fluctuation lead to visible defects such as thick and thin places in the woven cloth. In a Chinese spinning mill, the uster cv irregularity is used to identify malfunctioning machinery or poorly prepared raw material. A low coefficient indicates a smooth, high-quality yarn that will produce an even surface in the final garment.
The system also generates a diagram that helps technicians locate periodic faults caused by eccentric rollers or worn aprons. By comparing these values against global benchmarks, a mill can certify its production for high-end international buyers.
Process Scope
The measurement is limited to the physical dimensions of the yarn and does not account for colour variations or chemical properties. It focuses strictly on the geometry of the fibre distribution within the strand.