Material class quality observation

      Fabric and lining: more for the exterior and interior of the case material. Surface: the fabric can not be drawn, the stripes of the yarn should be clear and uniform color, the number of horizontal and vertical lines of yarn to be enough, the thickness should be enough and yarn to be straight (available measuring device test); glue bottom: paste glue firmly will not take off the bottom of the glue, the bottom of the glue will not be white (after grabbing by hand will not be white, keep the original glue bottom color); force: the direction of the horizontal and vertical lines combined with a good force after pulling will not be cracked. There are color materials at the same time to pay attention to whether there is reinforcement color, especially for the bright colors are more likely to produce staining phenomenon, bad color matching to the finished product found everything is too late!

      Foam and sponge: more for the case between the fabric and the lining, the case is not visible. Mainly look at the thick bottom and density is enough (a square whether there is enough weight). Good cotton has elasticity and is not easy to pull apart.

      Mesh: to have elasticity, good force, not easy to pull off, no broken yarn phenomenon.

      Webbing: there are many types of webbing, such as plain, fine grain, pit, etc., but each different specifications of webbing have a standard weight. Outside to see whether the two edges are smooth, the surface is uniform, no pilling, no yarn draw, no dyeing and other phenomena.

      Zipper: the quality of garbage chain cloth and slider is mainly distinguished by grade: such as A, B, C grade, the more forward the level of quality is better. Specifications are distinguished by size: such as No. 3, No. 5, No. 8, No. 10 and other sizes, the larger the number, the larger the specifications. And each specification of the zipper has a standard weight, the weight is also the key to quality. Outside the main attention: pull smooth, will not have to pull the feeling of not smooth, pulling the sound is not very loud, available hand-pulled zipper teeth are not easy to burst open, and the slider in addition to the large, small bottom, the slider and pull the piece is not easy to pull apart, pull the piece to be solid, not easy to pull apart, deformation and other phenomena, color zipper at the same time to pay attention to whether there is a reinforcement of the color level. In order to avoid easy and fabric staining phenomenon will have serious consequences.