Wet Spun Linen Warp Tensile Strength and Single End Breakage
Wet spun linen warp breaking strength depends on low strength CV and elastic sizing film to resist cyclic shed tension and prevent single end loom stops.
Starting Marks Greige
Visual Defect
Surface defect appears as a narrow band of high or low pick density at the location where a loom resumed operation after a stop. Tension variations in the warp and weft during the first few cycles of the motor cause these visible irregularities in the fabric. Identifying starting marks greige is an important task for inspectors who must grade the cloth before it proceeds to the finishing plant.
These marks are often permanent and cannot be removed by subsequent scouring or calendering.
Loom Calibration
Precise control of the let off and take up motions is required to keep the fell of the cloth in the correct position during a shutdown. When starting marks greige occur frequently, the technician must calibrate the loom settings to compensate for the creep and relaxation of the flax yarns. Linen is particularly sensitive to these stops because of its low elasticity and high stiffness.
Quality Grading
Inspectors count the number of these defects per hundred meters to determine the commercial value of the roll and assign it a grade. Any instance of starting marks greige that exceeds the width of two picks typically results in the fabric being downgraded to a lower quality category. Establishing strict tolerances for these visual flaws ensures that the buyer receives a consistent product for garment manufacturing.
Fine linen producers utilize electronic sensors to detect and record every stop to manage the quality of the final export.