Why is the fabric underweight?
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1. Failure to produce according to specifications, insufficient weft density and warp density
2. The raw material fineness (thickness) is insufficient and deviates from the nominal fineness.
3. The tide return rate is insufficient. Fabrics that have been printed and dyed lose a lot of moisture during drying, and the specifications of the fabric refer to the weight per square meter under the standard moisture return rate. Therefore, when the climate is dry and the dried cloth does not fully return to moisture, the weight per square meter will be insufficient. Especially for natural fibers such as cotton, linen, silk and wool, the deviation will be very large.
4. The raw yarn wears out a lot during the weaving process, which will cause excessive hairiness to fall off, causing the yarn to become thinner and result in a lower weight per square meter.
5. Re-coloring during the coloring process will cause a large loss of spinning yarn and cause the yarn to become thinner.
6. During the singeing process, the excessive firepower of the singeing will cause the cloth surface to be too dry, and the spinning yarn will be damaged during desizing, causing it to become thinner.
7. Damage caused by caustic soda to spinning yarn during mercerization.
8. Damage to the cloth surface caused by scratching and finishing after sanding.
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