Metric Count
Yarn linear density measurement in the metric system expresses the length of a single gram thread of material in meters. A yarn categorized as nm 39 yarn has a linear density where thirty nine meters of the single ply linen yarn weigh exactly one gram. This medium fine count is typically produced from wet spun flax fibres of moderate length.
The resulting thread balance provides an optimal combination of tensile strength and suppleness for producing shirt weight linen fabrics.
Spinning Control
Wet spinning parameters on the ring frame must be carefully monitored to maintain this specific yarn thickness. Draft ratios, spindle speeds and temperature settings of the water bath are configured to ensure that nm 39 yarn remains within the acceptable tolerance margin of the target density. Mill operators adjust these variables to compensate for variations in the quality of the incoming flax rove.
The yarn is tested multiple times during each shift to prevent the production of off specification counts.
Product Specification
Sales contracts for linen yarn require the supplier to certify both the count and the twist multiplier on the shipping invoice. When mills export nm 39 yarn, the laboratory certificate must accompany the customs clearance document to verify compliance with international standards.
