Warp Tension Dynamics and High Density Flax Weaving Mechanics
High-density flax weaving requires precise active warp tension control, asymmetric shedding, and 10 percent size add-on to prevent peak load breaks.
Reed Mark Formation
Visual Irregularity
Longitudinal streaks in the woven fabric result from the uneven spacing of warp yarns as they pass through the metal comb of the loom. Avoiding reed mark formation requires the selection of a reed with the correct wire thickness and density for the specific yarn count. These marks appear as thin gaps or dense clusters that run parallel to the selvage.
Weaving Geometry
Pressure from the reed wires during the beat-up motion can force the warp ends out of their natural alignment. In the context of reed mark formation, the tension of the warp and the timing of the shed closure determine whether the yarns will redistribute evenly after the pick is inserted. Heavier fabrics made from coarse flax yarns are more prone to this issue because the threads do not have enough space to shift.
Changing the drawing-in draft or using a finer reed with more dents per centimeter can mitigate the visual impact. Finishing processes like calendering or washing often help to close the gaps, but they cannot entirely remove a structural error.
Quality Inspection
Grading of the finished cloth involves checking for these vertical lines under standardized lighting conditions. If reed mark formation is visible from a distance of one meter, the fabric is usually classified as second quality or rejected for high-end garment production. Mill standards define the maximum allowable intensity of these marks before a batch is downgraded.