In the process of scouring, bleaching, printing and dyeing, the fabric undergoes many times of mechanical warp tension, which causes the warp direction of the fabric to stretch and weft direction to shrink, resulting in phenomena such as uneven width, uneven cloth edges, and weft skew. In order to overcome the above shortcomings, the fabric must be tentered. Tentering is based on the plasticity of cotton fibers in a wet state. During the drying process, the state of warp and weft yarns in the fabric is adjusted to stretch the fabric width to the specified size to achieve the effect of shape stability. The role of whitening is to eliminate the glow on the fabric, improve the whiteness of the bleached cloth , and make the white ground of the light-colored printed cloth more white and brighter.
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