Fiber Density
Raw flax sliver passing through the first gill box receives a linear mass measurement known as NeL Count, which establishes the weight per unit length across a set distance of continuous drawing. Spinning mills apply this specification during the carding and drafting stages to govern sliver regularity before roving frames twist the material into fine linen yarn. Commercial acceptance hinges upon this metric because variations beyond five percent trigger automatic rejection under standard European flax trade protocols.
Draft Ratio
Drawing frames maintain linear consistency by altering roller speeds according to incoming sliver measurements. Operators calculate draw ratios by comparing feed speed against delivery speed to correct for mass inequalities detected during sliver formation. Long staple processing requires precise draft adjustments to prevent fiber breakage when mechanical stretch exceeds the natural elasticity of the flax material.
Yarn Equivalent
Final output verification translates linear mass values into commercial count numbers for weaving mills purchasing bulk linen supplies. Quality control laboratories test conditioned samples under controlled atmospheric humidity to ensure moisture regain does not distort mass calculations. Export documentation records these verified values to certify that finished yarn meets the strict tensile strength requirements demanded by high-grade textile manufacturers.
