Integration of Reed Width Contraction and Loom Crimp Take up in Linen Weaving
Reed width contraction and warp crimp take-up in linen weaving require dynamic adjustment of loom tension and denting space to offset flax inelasticity.
Temple Mark Defect
Finishing Metric
The temple mark defect is a physical distortion occurring on woven linen fabric during the final stentering and heat setting stages, appearing as small parallel pinholes or vertical distortion marks near the selvage edges where the pin chain or clips hold the cloth under tension. Mill inspectors record this fault in the final quality control audit report before packaging rolls for export to European buyers who maintain strict zero tolerance thresholds for selvage damage. A fibre grade describes the natural cleanliness, length and tenacity of raw flax harvested from retting fields, whereas a fabric grade evaluates the structural integrity, yarn count and surface regularity of the finished loom state or dyed cloth.
Internal mill quality standards define the acceptable limits for factory efficiency and in house yield, while buyer acceptance criteria dictate the legally binding thresholds for commercial delivery rejection.
Mechanical Cause
Tension pins mounted on the finishing tenter frame pierce the wet linen web to control shrinkage rates during drying, but excessive mechanical force or incorrect pin gauge settings leave permanent distortion marks known commonly as the temple mark defect. Mechanical operators adjust the overfeed ratio and rail width to reduce physical stress on the delicate flax yarns during thermal stabilization, preventing permanent elongation of the warp threads adjacent to the cloth margins. High speed processing increases the risk of fiber displacement when the moisture content of the linen drops below the critical threshold during the final drying zone.
Temperature fluctuations across the steam heated cylinders cause localized fiber expansion, resulting in distorted pin holes that compromise the tensile strength of the affected selvage zone.
Commercial Impact
Export contracts classify the temple mark defect as a structural imperfection that reduces the usable width of the linen bolt by forcing garment manufacturers to discard the damaged margins during pattern cutting. Importers deduct financial penalties from the final invoice when the frequency of pin distortion exceeds two occurrences per linear meter of finished fabric. Garment makers require flawless selvage edges to ensure accurate alignment during automated cutting operations, making any edge distortion commercially unacceptable for high end apparel production.
Strict adherence to pin density limits eliminates the temple mark defect from commercial shipments and preserves the structural integrity of the exported linen.