Fibre Uniformity
Variations in flax density across the length of a single stem indicate thin places. These zones represent segments where the fibre bundles possess a lower diameter or count compared to the adjacent stalk portions. Proper mill calibration detects thin places during the initial mechanical hackling phase to prevent breakage during spinning.
Equipment sensitivity settings define the threshold at which the material is flagged for removal. Accurate detection stops the compromised section from progressing to the later drafting stages where high tension causes failure.
Drafting Resistance
Spinning machines evaluate input sliver by measuring the pressure exerted against feed rollers. A sudden drop in the required torque marks the passage of thin places through the processing line. Operators use this data to adjust the speed of the delivery rollers to maintain consistent linear density in the resulting yarn.
Automated optical sensors provide a real-time record of these shifts in the production log. Failure to compensate for these defects results in weak points in the finished linen fabric.
Quality Standard
Fabric grading relies on the assessment of surface regularity after final finishing. The occurrence of thin places reduces the structural integrity of the cloth and lowers the tensile strength of the end product. Buyer acceptance criteria specify a maximum density deviation per square meter of finished linen goods.
Mill laboratories quantify these irregularities by performing destructive pull tests on randomly selected samples. Any variance exceeding the stated tolerance triggers an audit of the entire batch. Consistent monitoring of these intervals prevents the manufacturing of substandard textiles.
