Material Depletion
Physical mass reduction occurs when raw bast fibers undergo chemical or thermal treatments to remove non-fibrous plant materials. In linen processing, non cellulosic biomass loss refers to the removal of pectins, hemicelluloses, lignin, and waxes that bind the flax fiber bundles together in the plant stem. This removal is necessary to soften the fiber and achieve the high-quality spin required for premium apparel.
Chemical Processing
Boiling flax yarn in alkaline solutions dissolves these gummy substances, leading to a significant reduction in the dry weight of the yarn. The spinning mill must carefully monitor this weight change because it affects the total yield and the final count of the finished yarn. If the non cellulosic biomass loss exceeds the specified target, the yarn becomes weak and prone to breakages during weaving.
This loss is therefore a critical quality metric in the wet processing department.
Weight Reconciling
Industrial contracts establish the standard allowances for this processing loss to prevent disputes over short-weight yarn shipments. The mill calculates the pre-treatment and post-treatment weights of each yarn lot to document the precise percentage lost during finishing. This documentation ensures that the buyer is billed only for the actual weight of the purified linen yarn.
