Aluminum coil coating not only has the function of rust prevention and corrosion resistance, but also has decorative effect. Therefore, the appearance of the aluminized coil should be checked. The appearance of coated high-quality aluminum coil and color coated aluminum coil shall be consistent without color difference. The painted surface is also the color surface without coating. The color surface is smooth without zero. Therefore, when you purchase materials, you can optimize the selection of materials from the aspect of appearance, as shown below. By carefully observing the appearance of materials, you can ensure that the purchased materials are of good quality: there may be defects or defects in the materials; When optimizing the selection of coated aluminum coil, from the appearance, the basic requirement is to carefully observe the material surface to see whether the material is obvious. If there are quality defects and process defects, it means that the quality of the material is not good enough. Look at the color of the material surface: good quality aluminum coating will reach a high quality level. High quality raw materials and advanced technology make the surface and texture. Therefore, the surface color of the material is very uniform and bright. From this point of view, we can use a specific method to evaluate the quality of materials, check the color of material surface, and then optimize the selection of materials. Look at the treatment of the end of the material: the coating with good process can have good quality. The material with good process should not only have good surface and texture quality, but also be optimized at the end. We can judge the quality of materials according to the effect of edge treatment, consider the appearance of material ends, and optimize the selection of materials.