Greige Fabric Defect Inspection Standards across Sectional Warping Batch Runs
Sectional warping batch inspection requires matching drum cone angles to yarn build and scoring periodic band faults under strict four point penalty thresholds.
Crimp Variation
Structural Measurement
Geometric deviation in the wave frequency and amplitude of interlaced yarns alters fabric hand, bulk, and dimensional behavior across piece goods. Systematic testing measures crimp variation by dissecting warp and filling strands from finished linen cloth under calibrated tension in accordance with GB/T 4668 testing protocols. The unbent yarn length is compared against the linear dimension of the original fabric strip to derive percentage crimp across multiple test sections.
Higher deviations indicate uneven warp let-off or variable wet finishing relaxation during stenter processing.
Mechanical Cause
Inconsistent tension across the loom beam during shed formation directly induces differential take-up in linen yarns. When individual warp ends experience higher beam drag, their crimp value drops while adjacent loose ends bunch up into pronounced undulations upon cloth fell release. Differential absorption of caustic boiling solutions in open-width desizing ranges also exaggerates shrinkage discrepancies between flax bundles.
Wet processing stabilizes the relaxed state, locking in irregular fabric densities.
Acceptance Standard
Laboratory certificates record warp and filling crimp spreads across three distinct locations across the usable fabric width. Quality specifications set maximum allowable batch variation limits for high-density linen shirtings to prevent bowing and skewed seams during automated garment cutting. Mills adjust finishing stenter overfeed percentages whenever tested crimp exceeds contracted tolerances.