Determining Customs Tariff Classifications for Raw Linen Fibres
Determining customs tariff classifications for raw linen fibres requires precise physical identification of retting, scutching, and hackling processing stages under HS heading 5301.
Scutching Extraction
Fibre Separation
Mechanical scutching extraction removes woody shives and unwanted vegetable matter from flax stems during primary processing. Mills perform this action after retting to break the brittle stalks through a series of fluted rollers. The resulting operation yields long line fibre suited for high quality linen yarn production.
Process Efficiency
Heavy rotating blades beat the stalk material to ensure the separation of bast fibre from the core tissues. Operators maintain precise clearances between these blades to prevent damage to the delicate internal structure of the flax strands. Adjustments to the hammer speed or the clearance gap change the yield of long fibre versus short tow residues depending on the raw material quality.
This mechanical intervention determines the final recovery rate of usable fibre before it reaches the carding stage.
Quality Verification
Technical inspectors examine the output samples to determine the percentage of shive content remaining in the processed bundles. These measurements provide the primary data for the internal mill grading report used to set the price for exported flax shipments. High levels of residual material indicate a need for further cleaning or adjustments to the machine settings in the scutching line.
Strict adherence to the standard recovery percentage ensures the buyer receives the expected yield for spinning purposes.