The following problems should be noted in the deep cleaning of stone: 1. Should be tested first. The 'diseases' of stone vary widely, for example, there are many types of deliquescent salts that form water spots. Therefore, we do not know the specific causes of smudges, we advocate small trials first. 2. Carefully choose a cleaning agent. Inferior cleaning agents are often some strong acids, they are likely to cause more serious stone diseases, such as surface loss and chalking, water spots and saline spots, loose dissolution and yellowing. Therefore, it is recommended that users should first select high-quality products from reliable manufacturers. Secondly, they should protect the parts that are not ready for cleaning before cleaning. After cleaning, the residual chemicals should be removed. In addition, the cleaning of stone cultural relics should be done by relevant experts. Argument. At present, we have cleaning agents for cleaning rust yellow spots, organic spots, salt spots and white leaves, some water marks and water spots, etc., and continue to improve and develop new cleaning agents. In addition to common chemical cleaning methods, we are experimenting with safer physical cleaning methods such as steam flow, particle flow, electrochemistry, ultrasonic or laser cleaning. PVC Edge Banding,Competitive PVC Edge Banding,Edge Banding Paulownia Edge Glued Board Co., Ltd. , http://www.nsplywood.com