Tarpaulin direct measurement method

Tarpaulin direct measurement method The direct measurement method is completed by means of a cloth mirror or a fabric density analysis mirror. The length of the scale of the fabric density analysis mirror is 5cm. Under the analysis lens, a long glass piece is engraved with a red line. When analyzing the fabric density, move the lens and align the red line on the glass piece and the red line on the scale at the same time. Between the yarns, take this as the starting point, and count the yarns while moving the lens until the 5cm scale line is this. The number of output yarns is multiplied by 2, which is the density value of 10cm fabric. When counting the number of yarns, take the center between the two yarns as the starting point. If the count reaches the end point, it exceeds 0.5, and when it is less than one, it should be counted as 0.75. If it is less than 0.5, press 0.25 root count. Generally, 3-4 data should be measured for fabric density, and then the arithmetic mean value should be taken as the measurement result.