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How to identify the quality of colored stainless steel plates Today we will teach you how to identify the quality of colored stainless steel plates from three aspects. Firstly, Look at the material: The commonly used materials of colored stainless steel plates are 201 stainless steel and 304 stainless steel. Among them, 304 stainless steel plates have higher corrosion resistance than 201 stainless steel plates, and the genuine materials are smoother and brighter than rolled materials. Because of the large price difference, many merchants use inferior materials as genuine materials and use rolled materials as genuine materials and 201 as 304. Therefore, when inspecting the goods, the first task is to verify whether the plate is of the specified material. 201 and 304 can be distinguished by testing solution, while the genuine material and the rolled material are mainly distinguished by observing the quality of the plate surface. The surface of the genuine material plate is smooth and flat, with uniform color and high brightness, and the thickness of the whole plate is consistent, while the rolled material plate surface is dark, uneven in color, often with black or stripes, and there are roller stamps on the back. There are many defects such as sand holes, peeling and water marks, and the thickness difference of the plate surface can reach 2 to 3 silks. However, with the improvement of production processes and technologies of many large rolling plants, the gap between genuine materials and rolled materials is slowly narrowing. Some imitation genuine material plates can even be mistaken for the real ones, and require experienced professionals to distinguish. Secondly, Visual effect: Colored stainless steel plates are mainly used in the field of decoration, and the ornamental and decorative properties of the plate surface are very high. Good colored stainless steel plates should have no color difference visible to the naked eye under direct sunlight, no color difference in the whole batch of plates, uniform coloring, good color, no scratches, bending and no fading, and the surface of the stainless steel mirror plate should have no grinding head flowers and horse tracks, and high brightness. Thirdly, Remove the film: Colored stainless steel plates are affixed with a protective film before leaving the factory. Many unsalable plates have been stored in the warehouse for a long time, and the protective film has become powdery and difficult to tear off, or after being torn off, there is still a lot of glue on the surface of the plate, which is ugly and difficult to remove, and time-consuming and labor-intensive. Even if it is a transparent film, everyone must tear off a large piece to check the quality of the film when inspecting the goods. If it needs to be cut, bent and formed later, it is best to apply a protective film of 6C or above first to avoid scratching the plate surface. After the colored stainless steel plate is installed, the film layer should be torn off as soon as possible to avoid getting glue on it. Especially for outdoor decoration, due to direct sunlight, it is best to tear off the protective film immediately after the construction is completed. When you choose Hua Steel co., we will use PMI machines which can quality and efficient to show you the material is 201 ,or 304 or 316 etc.