Greige Substrate Verification Metrics in Wet Processing
Greige qualification governs wet processing uptake through conditioned mass accounting, chemical size identification, capillary absorbency, and bow tolerances.
Reed Marks
Defect Classification
Vertical striations appearing in woven fabric result from uneven spacing of the metal wires within the loom reed. These reed marks create visible lines that run parallel to the warp direction throughout a production run. Mechanics attribute the spacing variation to bent dents or improper tension settings during the frame assembly process.
Inspecting the cloth under a light table reveals the irregularity before any finishing treatment occurs.
Detection Protocol
Qualified technicians place the textile over a high intensity backlit surface to identify recurring gaps. Even minor fluctuations in the reed wire alignment force a change in the light transmission through the warp ends. Grading standards usually permit a tolerance for minimal deviation but reject any batch showing clear light transmission lines.
Measuring the frequency of these lines against the total loom width confirms the structural origin of the issue.
Manufacturing Impact
Tension imbalances occur when the reed dents fail to distribute the warp ends with exact uniformity. Fabrics prone to this problem require a complete removal of the damaged equipment from the loom before operations continue. Repairs to the reed hardware rarely hold under high speed tension, so replacement remains the primary solution for sustained output.
Verification Requirement
Quality control departments assess the grey goods after the removal from the loom to ensure the defect does not propagate into the dyeing stages. Finishing processes frequently worsen the appearance of these lines because heat and moisture encourage the warp threads to settle into the existing gaps. Consistent identification at the grey stage prevents the wastage of chemistry and energy on fabric that lacks the necessary surface uniformity for garment construction.