Fiber Preparation
Liquid application during drawing frame passage modifies the raw flax sliver by introducing heated moisture directly into the drafting rollers. Wet flax spinning softens natural pectins within the bast material, which allows individual ultimate cells to slide past each other under mechanical tension. Mill technicians monitor bath temperature and immersion duration closely because excessive thermal exposure degrades cellulose chains prematurely.
Production logs record these parameters alongside ambient relative humidity values inside the preparation hall to maintain consistent sliver cohesion before the roving stage. Slivers processed through heated liquid demonstrate higher parallelization ratios than dry-drafted equivalents, yielding finer count yarns upon final delivery.
Yarn Grading
Count uniformity testing evaluates the resultant wet spun flax yarn against established linear density tolerances recorded in mill inspection ledgers. Quality controllers measure single-end breaking strength and hairiness indices on conditioned packages drawn from the spinning frame output. Fabric grade classification depends entirely upon these mechanical test outcomes, whereas fibre grade evaluates raw hackled material prior to any liquid immersion.
Mill acceptance thresholds often diverge from buyer quality specifications, necessitating secondary laboratory verification before commercial release.
Export Documentation
Final yarn packaging requires detailed certificates of origin and botanical phytosanitary clearances issued by authorized inspection bureaus prior to international transit. Commercial invoices specify exact moisture regains alongside dry mass quantities to account for ambient humidity fluctuations during ocean freight carriage. Customs authorities verify these shipping declarations against physical lot samples pulled randomly from sealed export cartons at the loading port.
Finished linen weavers rely upon these standardized documentation packages to verify raw material pedigree before committing yarn lots to high speed looms.
