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.
Take up Percentage
Weft Contraction
The quantitative expression of fibre loss during loom processing defines the amount of horizontal length consumed by the interlacing of warp and weft yarns within a woven fabric structure. Take up percentage functions as the primary variable for determining the total length of raw yarn required to achieve a specific finished width on the loom beam. Spinning mills calculate this value by comparing the length of yarn removed from a fabric sample to the original width of the weave, providing an essential correction factor for material procurement and cost estimation.
Because excessive tension during the shed formation alters the physical properties of flax, operators must record the exact ratio of input yarn to output cloth in the master production log. Standardisation of this ratio allows the mill to calibrate the mechanical force applied by the shuttle or rapier motion, preventing premature yarn fatigue during high speed production cycles.
Warp Tension
Measurements of the longitudinal shift provide the necessary input for calculating total consumption requirements in the finishing department where cloth shrinkage remains a permanent constraint. Flax fibres exhibit low elasticity, so the tension applied during the insertion of the weft determines the final density of the weave. Technicians verify the accuracy of the loom settings by measuring the difference between the reed width and the grey cloth width after the fabric clears the loom.
Each batch of yarn possesses unique structural characteristics that dictate the appropriate speed of the shuttle, meaning that a static set of rules for tension often results in uneven selvedge quality. If the yarn exhibits high rigidity, the reduction in width increases proportionally to the force exerted by the tensioning rollers. Adjusting the mechanical drag ensures the finished bolt aligns with the specification sheet provided by the buyer.
Processing Yield
Accurate records of material balance assist in the traceability of linen through the stages of spinning and weaving. Every lot of flax yarn undergoes testing to establish the correlation between the weight of the feed stock and the mass of the final textile output. Excessive loss during the manufacturing stage affects the profitability of the mill.
Precise monitoring of this metric controls the variance between expected yield and actual weight.
Ends and Picks That Deliver a Target Weight in Linen
Target linen weight depends on yarn tex, ends, picks, and crimp contraction; calculating raw count without finishing shrinkage overshoots mass targets.