ISO 16549 Textile - Evenness of Textile Yarns - Capacitance Method

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 16549 testing. This standard describes a method using capacitance measuring equipment to determine linear density unevenness along the length of textile strips.

The method can be applied to tops, strip, roving, spun yarns and continuous filament yarns made from natural or man-made fibers in the range of 4 tex (g/km) to 80 ktex (kg/km) for staple. It ranges from 1 tex (g/km) to 600 tex (g/km) for fiber slivers and continuous filament yarns.

It does not apply to fancy yarns or strips made entirely or partially of conductive materials such as metals; the latter requires an optical sensor and raw silk filaments tested to a specific standard. The method describes the preparation of a variance-length curve as well as the determination of periodicities of linear density.

The yarn is wound around a panel with the specified winding density based on the linear density of the yarn. The panel can be rectangular or trapezoidal and should be of a contrasting colour. Trapezoidal panels produce a moire effect, emphasizing short-term irregularities in the yarn.

Panels are evaluated visually using agreed lighting. It may be helpful to tilt the panel during evaluation.

EUROLAB assists manufacturers with ISO 16549 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.