In real life, there are many things that need zippers. For example, zippers can be found in clothes, suitcases and shoes. If you know anything about them, you know that there are many kinds of zippers. For example, there are many kinds depending on the material. For example, waterproof zipper and metal zipper are often exposed in daily life, but we do not know how to identify whether the quality of zipper is good or bad. So today I will explain to you what can be used to identify the quality of a zipper:

      1. Specifications of zipper
      The specification of the zipper refers to the width and size range of the chain after the two connecting teeth are joined. The unit of measurement is mm. The specification of the zipper is the basis of the shape and size of each component, and it is a very important characteristic size. The type of zipper is an important embodiment of its shape, structure and performance characteristics. The type of zipper not only includes the specifications of the zipper, but also reflects the performance characteristics of the zipper, that is, the technical parameters and functions of the zipper.

      2. Flatness of zipper
      The flatness of the zipper is tested by taking a finished zipper and placing it flat on a flat bench so that it is in its natural state. Then run your finger back and forth along both sides of the edge of the chain tooth, gradually drawing closer to the bend with a ruler. Then, use another ruler to measure the distance between the teeth of the chain and the ruler. This distance is the flatness.

      3. The strength of the zipper
      The strength of the zipper is a very important performance index, which determines the application range and durability of the zipper. In the zipper standards of various countries, there are clear provisions on the strength, and it is also the basis for testing the quality of the zipper. Different specifications and models of zippers have different strengths for different purposes. The supplier of zippers will generally give a reference selection of specifications, models and applicable scope. The specifications and models of the zipper shall meet the requirements for use. Once confirmed, the specifications and models shall meet the requirements of the order.

      4. Color of zippers and zip ties
      The color of zipper and zipper strap should be the same as the confirmed sample, otherwise the sample should be returned. If it is required to match the large body color, it is also necessary to check again with the fabric, and check whether the same zipper has color difference, whether the same batch zipper has color difference and so on.