Calculating Bone Dry Fiber Mass in Raw Flax Roving Transactions
Cross border flax roving settlements adjust gross package mass to bone dry fiber weight using standardized oven desiccation and contractual regain factors.
Core Sampling Protocol
Extraction Standard
Standardised agricultural test methods specify the physical retrieval of inner material from packed fibre bales to evaluate quality without opening the entire shipment. The core sampling protocol defines the diameter, depth and location of the extraction cuts required to obtain a statistically valid sample from compressed linen flax. Chinese mills rely on this standard to assess the humidity and clean fibre content of incoming raw materials from European growers.
This operational routine prevents superficial surface measurements from distorting the true average moisture profile of dense agricultural packages.
Technical Execution
Specialised hollow tubes equipped with sharpened tips penetrate the bale along its longitudinal axis to retrieve the internal core. Using this mechanical extraction method, the operator obtains a cylindrical cross section that represents the fibre distribution from the exterior jacket to the high-density interior of the bale. The core sampling protocol requires multiple extraction points per shipment lot to neutralise differences between individual bales.
This procedure remains critical because the center of a dense bale retains moisture longer than the dry outer faces.
Moisture Verification
Retrieved fibres undergo immediate transfer into sealed plastic containers to prevent any moisture exchange with the surrounding air before laboratory weighing. The laboratory technicians use these samples for oven-drying tests that yield the certified moisture content of the entire raw flax shipment.
Standard Regain Calculation Procedures for Scutched Flax Fibre
Standard regain for scutched flax fibre is 12.00 percent, used to convert lab oven-dry mass into binding commercial invoice mass under ISO 6741.