Weft Density
Lateral fabric shrinkage inside the loom harness occurs when tensioned linen warp threads constrain inbound filling yarn during beat up. Reed width contraction describes the physical difference between the linear dimension of a warp layout inside the steel dents and the finished grey cloth measurement taken prior to wet processing. This dimensional delta arises because high warp tension forces individual flax fibres to bend around crossing picks, which pulls the outer selvages inward toward the centreline of the weaving machine.
Production supervisors record this reduction percentage on the daily loom specification sheet to maintain consistent weight per square metre across the final batch.
Tension Mechanics
Friction between unyielding flax stalks and the reciprocating steel wires generates mechanical resistance that restricts lateral movement. Warp yarn spacing determines how much sideways shrinkage develops during the insertion phase. Higher density layouts produce greater inward pulling forces because closely packed vertical strands exert more lateral pressure on the filling pick.
Operators adjust warp let off weights and take up speeds to counteract excessive pulling before permanent set occurs in the grey fabric.
Quality Verification
Inspection teams measure the grey cloth immediately after doffing to verify whether the final width matches internal production targets or external buyer purchase tolerances. A mill standard establishes acceptable limits for in house loom efficiency, whereas buyer acceptance criteria dictate contractual penalties for excessive width loss. Fabric grading relies on these measurements to separate export quality linen from second grade material destined for domestic markets.
Finished goods undergo final evaluation against the agreed technical dossier once the scouring and bleaching stages are complete.
