Yarn Specification
Mass per unit length defines the thickness of flax slivers and drafted rovings during wet spinning in Chinese mills, where ISO 2060 governs the determination of linear density through the skein method. Technicians pull continuous strands from conditioned packages stored in standard atmospheric chambers, winding precisely one hundred wraps onto a motorized reel before transferring the material to an analytical balance. This numerical value dictates drafting roll pressure and traveler weight on ring frames, preventing excessive breakage during high speed drawing stages.
Ambient humidity alters moisture regain in bast fibres, requiring strict adherence to temperature controls during testing to avoid false readings in the laboratory report. Contractual agreements between local spinners and international buyers rely on these figures to establish acceptance thresholds for export consignments.
Count Verification
Skein mass calculation provides the numerical foundation for batch grading, converting raw grams per kilometer into standardized tex numbers for commercial invoicing. Operators weigh dried samples after conditioning in a forced convection oven, compensating for natural moisture variations inherent in plant based material. Laboratory technicians record the resulting mass against nominal purchase orders, separating mill internal process targets from strict customer tolerance limits.
Commercial disputes often arise when unconditioned lots absorb humidity during transit, shifting the measured mass outside agreed contractual boundaries.
Export Standard
Final inspection protocols demand complete traceability across all processing steps, linking yarn linear density measurements directly to baled flax inputs and finished woven cloth specifications. Quality auditors cross reference test certificates against packaging labels before freight forwarding agents release containers for maritime transport. Fabric grade determinations depend on these preliminary yarn measurements because uneven linear density creates visible streaks across woven surfaces during dyeing operations.
Strict compliance with international testing protocols ensures consistency across large production runs without relying on subjective visual assessments.
