Measurement Unit
A traditional measurement unit used to designate the fineness of linen yarn indicates the number of three-hundred-yard cuts that weigh one pound. Known as the lea, the yarn count LE is an indirect numbering system where a higher number corresponds to a finer, thinner thread. For example, a forty lea yarn is twice as fine as a twenty lea yarn, requiring different settings on both the spinning frame and the weaving loom.
Spinners use this metric to grade their output and to fulfill specific textile contracts that demand precise yarn dimensions. The mill records this value on every yarn package and shipping invoice to ensure the correct density for the final woven cloth.
Grading System
A laboratory test confirms the density by weighing a measured length of yarn under standardized moisture conditions. When determining the yarn count LE, the technician winds a specific skein length and weighs it on a precision grain scale. This test is recorded on the yarn test report to confirm that the spun lot meets the target fineness within the allowed tolerance.
A deviation from the target count causes uneven fabric thickness and alters the weight of the woven linen.
Acceptance Standard
A comparison of the measured fineness against the buyer’s specifications determines whether the shipment is accepted or rejected. If the yarn count LE falls outside the agreed limits, the mill must re-spin the lot or discount the batch. This quality threshold ensures that the warp and weft density remain consistent during the subsequent weaving run.
