Fibre Specification
Raw plant material arriving at the mill requires careful sorting before spinning begins. Flax fibre grading provides the standardized measurement framework applied during the initial intake phase in Chinese textile plants. Technical workers assess length, fineness, strength and cleanliness against strict physical benchmarks recorded in the official mill intake ledger.
This sorting process establishes distinct lots for subsequent processing stages while separating raw agricultural output from finished cloth categories. Subsequent production lines depend entirely on this initial sorting procedure to maintain yarn consistency across spinning and weaving operations. Mill acceptance standards differ substantially from the downstream buyer criteria used in export markets, because the former prioritizes mechanical processing efficiency while the latter focuses on aesthetic surface appearance.
Evaluation Protocol
Skilled technicians execute physical tests on sampled bundles drawn from every delivered bale. Operators measure tensile resistance and evaluate residual shive content using standardized laboratory instruments under controlled atmospheric conditions. Lower grades exhibit irregular lengths and higher lignin concentrations that prevent smooth passage through high-speed drawing frames.
Higher grades demonstrate uniform fineness alongside superior elongation properties required for producing fine linen yarns. Mechanical sorters discard contaminated lots before those materials reach wet spinning machines, thereby preventing machinery jams during continuous production runs. Inspectors record numerical scores on internal quality sheets that accompany each material batch through carding and combing departments.
Export Verification
Finished yarn output undergoes final inspection before bales leave the mill floor for international shipping ports. Trade contracts specify minimum acceptable thresholds for strength and evenness to protect overseas buyers from receiving substandard material. External auditors review mill records to confirm that graded batches match the specifications stated on commercial invoices.
Divergence between internal mill standards and destination requirements leads to commercial disputes and rejected shipments at the port of entry. Strict adherence to recognized classification rules ensures commercial trust between Chinese producers and foreign textile houses throughout global supply chains.
