Weight Analysis
Determination of the mass per unit area of unfinished woven fabric establishes the base density of the material before wet processing. This quantitative step, known as greige gsm calculation, measures the weight in grams per square meter of loom-state linen. Technicians perform this task immediately after weaving to ensure the cloth matches the structural specifications.
Production Formula
Accurate determination of unfinished cloth weight uses the warp density and the filling density per unit length. The calculation combines the ends per centimeter and picks per centimeter with the respective lea values of the linen yarn while adjusting for yarn crimp during weaving. Calculating the greige gsm calculation involves cutting a square specimen of one hundred square centimeters using a circular cutter, weighing the specimen on a digital balance, and multiplying the result by one hundred.
Alternatively, the mill calculates this from the total weight of a woven roll divided by its total area in square meters.
Tolerance Boundary
Export contracts for high-quality linen allow only small deviations from the calculated target density. If the greige gsm calculation yields a result outside the five percent tolerance range, the mill must investigate the yarn tension or the pickage rate on the loom. These weight measurements are documented in the mill sheet before the roll is sent to the bleaching department.
