The pure cotton fabric is composed of plant fibers. When the fabric is infiltrated, water molecules will enter the cotton fiber, which will cause the fiber to expand. The longer the time in the water, the larger the shrinkage. Of course, this is only relative, and it will not shrink endlessly.

In the process of textile dyeing and finishing of pure cotton fabrics, the fibers are stretched by a certain external force. After finishing, this stretch will temporarily be in a "stable" state. When soaking in water for washing, the water will gradually weaken the connection between the fibers of the fiber, the friction on the surface of the fiber will be reduced, the temporary "stable" state will be destroyed, and the fiber will return to or approach the original equilibrium state. Generally speaking, in the process of weaving, weaving, dyeing and finishing, it needs to be stretched many times, and the shrinkage rate of the fabric with higher tension is larger, and vice versa.

Everyone should know that the yarn weaving of cotton bedding can be roughly divided into 1288*68, 130*70/13372/40 satin/60 satin/80 satin and so on. The same (such as pre-shrinking treatment or steam pre-shrinking, etc., to eliminate the potential of fabric shrinkage in advance, after the pre-shrinking treatment, the fabric will generally not have a larger shrinkage).

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