Observation of material quality

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Fabric and lining: mostly used for the outer and inner materials of bags. Surface: fabric should not have drawn yarn, the yarn stripes should be clear and the color should be uniform, the number of horizontal and vertical stripes of the yarn should be sufficient, the thickness should be sufficient, and the yarn should be straight (can be tested with a measuring instrument); Glue base: the glue should be firmly attached and will not come off, and the glue base will not turn white (it will not turn white after being grabbed by hand, and the original glue base color will be maintained); Stress: it is good to merge the horizontal and vertical directions and will not crack after being pulled hard. For colored materials, pay attention to whether there is a reinforcement color, especially for bright colors, it is more likely to produce dyeing. If the color matching is not good, it will be too late to find out everything when the finished product arrives!

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Foam and sponge: mostly used between the fabric and lining of bags, and it cannot be seen in the finished bags. It mainly depends on whether the thickness and density are sufficient (whether one square meter has enough weight). Good cotton is elastic and not easy to pull apart.

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Net material: it should be elastic, have good stress resistance, not easy to pull apart, and no yarn breakage.
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Webbing: There are many types of webbing, such as plain, fine, grooved, etc., but each type of webbing has a standard weight. Check the outside to see if the two edges are smooth, the surface is uniform, and there is no linting, no yarn drawing, no dyeing, etc.

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Zipper: The quality of zipper cloth and slider is mainly distinguished by grade: such as A, B, C grades, the higher the grade, the better the quality. Specifications are distinguished by size: such as 3, 5, 8, 10, etc. The larger the number, the larger the specification. And each type of zipper has a standard weight, and weight is also the key to quality. From the outside, the main attention should be: it should be smooth when pulled, there will be no feeling of pulling smoothly, the sound when pulled is not very loud, and the zipper teeth are not easy to burst when pulled by hand. In addition, the slider also has large and small bottoms, and it is not easy to pull the slider and the pull tab apart. The pull tab should be firm, not easy to pull apart, deformation, etc. At the same time, pay attention to whether the color zipper has a reinforced color level. In order to avoid easy dyeing with the fabric, the consequences will be serious.