Fibre Defect
Unbleached linen material failing prime classification enters mill processing records as greige fabric downgrades because uneven yarn diameter or rogue seed coat fragments alter surface tension during alkali boiling. Flax yarn irregularity originates in retting inconsistency or carding draft slippage rather than downstream power loom mechanics. Raw flax fibre grade depends solely on pectin content and pectinase breakdown rates, whereas woven cloth grade relies on warp and weft tension uniformity across the harness frame.
A spinning mill applies internal grading parameters to evaluate sliver regularity before drawing frames, while foreign buyers enforce strict acceptance criteria regarding breaking load and pick density per centimetre.
Classification Threshold
Inspection tables register greige fabric downgrades when loom state inspection sheets record excessive slubs or missing ends exceeding four defects per linear metre. Mechanical loom speed settings generate vibration ripples that cause localized warp breakage, producing subprime grey cloth batches that require diverted finishing routes. Mill export dockets separate prime unbleached output from secondary stock by stamping the bale wrapper with a colored marker according to density variance.
Production supervisors consult the mill defect catalog to determine whether subprime cloth suffers from reed marks or oily pick insertions.
Export Impact
Commercial valuation adjustments for greige fabric downgrades reduce the realized unit price on bills of lading destined for European apparel converters. Finished linen garment manufacturers purchase secondary grey cloth at a discount because alkaline peroxide bleaching cannot mask structural density faults inherited from the loom beam. Maritime shipping manifests list subprime unbleached textile bundles under separate commodity codes to satisfy customs valuation rules in destination ports.
Settlement terms between Chinese spinning mills and overseas trading houses explicitly state the financial penalty applied when secondary grey cloth exceeds agreed percentage limits within a container load.
