Classification Standard
Sorting criteria determine the market value of raw plant stems by evaluating structural properties such as fineness, color, and tensile strength. Bast fiber grading provides the objective framework for mills to categorize incoming agricultural shipments based on their suitability for specific spinning counts. These assessments occur upon delivery at the processing plant where technicians separate long lines from shorter tow.
The resulting documents establish the technical basis for payment and designate which production lines will utilize specific bale portions. Consistent application of these protocols minimizes operational variance during the subsequent hackling stage.
Operational Protocol
Mill laboratories perform physical inspections under controlled humidity settings to ensure consistent results across different batches. Inspectors pull representative samples from each lot to measure the percentage of shive and non-cellulosic matter clinging to the stalks. Analysts then assign a numerical or alphabetical rank based on the deviation from the established botanical baseline.
High grades indicate long, uniform strands capable of sustaining the tension required for fine linen yarn production. Low grades undergo mechanical processing for coarser textile applications or industrial filler materials.
Commercial Distinction
Contractual arrangements differentiate between raw material categories and finished cloth specifications. Buyers set acceptance criteria within technical annexes to ensure the mill understands the exact requirements for a given end product. Mill standards represent internal goals for yield optimization while buyer criteria function as mandatory thresholds for shipment approval.
Successful outcomes rely on the accurate communication of these specifications before the physical grading process begins. Reliable classification remains the primary method for maintaining parity between suppliers and manufacturers in the global flax trade.
