Moisture Control
Measurement of the water content remaining in yarn after the drying process establishes its compliance with trade weight standards. In the production of high-quality linen, wet spinning regain determines the amount of moisture the yarn holds relative to its bone-dry weight after being spun in warm water. This moisture level must be carefully controlled to prevent yarn degradation during subsequent storage and transit.
Yarn Quality
Excessive moisture in the packed yarn packages promotes the growth of mold and mildew, ruining the shipment. Conversely, if the wet spinning regain is too low, the flax fiber becomes brittle and loses its natural elasticity, making it difficult to weave without frequent yarn breakages. To achieve the optimal balance, the mill passes the yarn packages through a controlled drying tunnel and then allows them to condition in a humidity-regulated room until the target moisture level is reached.
Maintaining this correct value also prevents yarn shrinkage and weight discrepancies during subsequent finishing processes.
Commercial Accounting
Standardized trade agreements calculate the invoice weight of linen shipments based on an agreed moisture percentage. The quality department records the wet spinning regain in the yarn laboratory log for every spun lot, utilizing a specialized moisture meter or oven-drying tests. This record ensures the mill invoices the buyer for the correct dry fiber weight plus the standard commercial moisture allowance, preventing legal disputes.
