Calculating Greige Fabric Yield from Loom Speed and Sett
Calculate linear greige yield by dividing net picks per hour by pick density, adjusting reed width and warp length for crimp contraction.
Sett Density
Fabric Architecture
Vertical and horizontal component counts define the structural integrity of finished linen goods. Sett density represents the specific frequency of warp and weft yarns within a square centimetre of cloth, providing the primary metric for grading loom output quality. Inspectors count these intersections using a calibrated magnification loupe to verify compliance against the technical specifications listed on a purchase order.
Manufacturers document these counts in production logs to confirm that machinery maintained target spacing throughout the entire duration of a warp run. Consistent frequency ensures predictable fabric weight, drape, and durability for high volume end uses.
Measurement Protocol
Technicians measure internal fibre alignment by isolating a single square area across both axes of the linen sample. This assessment occurs post weaving but before finishing processes introduce shrinkage or stretching that might bias the count. A deviation exceeding five percent from the target often triggers a technical audit of the reed selection or the tension settings applied during the warping phase.
Accurate records identify whether a discrepancy arises from individual yarn thickness variations or mechanical error within the loom frame.
Production Variance
Spinning adjustments influence how yarn behaves under the pressure of the loom beam and the subsequent settlement of fibres into their final positions. High quality flax allows for tighter spacing without risking breakage or surface abrasion during the repeated contact of the heddle eyes. Mills manage this physical constraint by balancing the tension of the individual warp lines against the speed of the shuttle passage.
Correct calibration of these factors dictates the ultimate stability of the finished textile.