Determining Flax Staple Profile Using Manual Comb Sorting
Manual comb sorting by ISO 2370 isolates technical flax bundle length profiles to prevent drafting waves, control short fibre content, and enforce purchase contracts.
Hand Hackling
Fibre Combing
Mechanical preparation of long flax staples follows the initial retting and scutching stages inside the provincial Chinese mill, where hand hackling operates as an intensive manual straightening and splitting process applied to clusters of technical fibres. Operators pull the material repeatedly through successive rows of upright steel teeth of graduated fineness, removing residual woody fragments known as shove while parallelising the ultimate strands into clean slivers. This specific workplace action separates the coarse outer bundles into finer filaments suitable for wet spinning, stopping immediately before the drafted material reaches the drawing frame.
Mill quality control records the output yield on the processing register, separating the long line flax intended for high count linen yarns from the shorter tow waste directed to coarser spinning lines.
Grade Differentiation
Inspection protocols distinguish raw fibre classification from finished cloth grading through distinct physical tests applied at separate operational checkpoints. Raw material evaluation relies on staple length, tensile strength and residual shive content measured against the mill internal processing standard, whereas buyer acceptance criteria focus upon yarn evenness and fabric tear resistance defined in export contracts. Technicians grade the combed flax using tactile assessment alongside microscopic diameter checks, recording density and cleanliness on the batch specification sheet.
Finished cloth undergoes entirely different mechanical testing for warp and weft density, dimensional stability and breaking load, ensuring the woven textile matches the agreed commercial specification before baling for overseas shipment.
Mill Standard
Internal operational benchmarks govern the transition of prepared flax from the hackling bench to the spinning floor, establishing precise tolerances for fibre alignment and cleanliness. Supervisory staff audit the manual combs daily for tooth spacing and wear, maintaining operational consistency across shifts without relying upon external certification bodies. This internal governance prevents substandard slivers from entering the wet spinning frames, protecting downstream yarn integrity and reducing breakage rates during high speed weaving operations.
The resulting measurement accuracy determines the final pricing tier assigned to the spun yarn lot before export packaging begins.
Standardized Air Permeability Test Parameters for Raw Flax Bundles
Air permeability fineness tests for raw flax require strict 65 percent RH conditioning, precise chamber packing density, and pre-cleaning of shive debris.