Testing Method
A standard laboratory procedure determines the precise water content of flax fibres before spinning or shipping. This process, termed moisture regain calibration, adjusts electronic testing instruments against a known dry mass of the material. Technicians heat the flax in an oven to find its absolute bone-dry weight, which they then use to calibrate resistive or capacitive moisture meters.
This calibration ensures that transaction weights remain fair and uniform across international borders.
Industrial Variance
Flax is highly hygroscopic and its weight changes rapidly in response to atmospheric humidity in the warehouse. Buyers and sellers agree on a standard moisture regain percentage, typically twelve percent, to calculate the commercial invoiced weight of the yarn. The moisture regain calibration must occur daily to prevent billing errors arising from environmental fluctuations.
Mill operators rely on these calibrated meters to avoid paying for excess water weight during raw fibre procurement.
Quality Control
Instrument accuracy directly affects the processing performance of the flax fibres during drawing and spinning. Excessively dry fibres become brittle and break easily, whereas overly damp fibres can rot during storage or clog the drafting rollers. Regular moisture regain calibration helps the mill maintain the spinning tension and yarn consistency required by buyer specifications.
