Sandpaper is a common abrasive tool, usually made of paper or cloth as the substrate, coated with abrasive particles, used for sanding, polishing, and trimming various material surfaces. It is commonly used in manual and mechanical processing and has the following main purposes:


1. Woodworking and furniture making: Sandpaper is widely used in woodworking and furniture making. It can be used to smooth the surface of wood, trim the edges and corners of woodwork, remove stains, paint, coatings, and old paint from the wood surface, make the wood surface smooth, and prepare for subsequent painting, painting, or polishing work.


2. Metal processing: Sandpaper is also commonly used in the field of metal processing. It can be used to remove rust, oxides, and stains from metal surfaces, flatten metal surfaces, trim the edges and corners of metal components, and improve the surface smoothness of metal products.


3. Car maintenance: Sandpaper is also frequently used in car maintenance and repair. For example, it can be used to remove coatings, paint, and scratches from car surfaces, level the surface of the vehicle, and prepare for painting work.


4. Ceramic and glass processes: Sandpaper is used in ceramic and glass processes to trim, polish, and treat the edges and surfaces of brittle materials such as ceramics and glass, making them smooth and achieving the desired shape and finish.


5. Handicrafts and Model Making: Sandpaper is also commonly used in handicrafts and model making to trim and polish various materials, such as wood, plastic, resin, etc., to obtain the required smoothness and shape.




In short, sandpaper is a common abrasive tool widely used in multiple fields, used for sanding, polishing, and trimming various material surfaces to make them smooth and flat, and prepare for subsequent processing work. Sandpaper with different particle sizes and materials can be selected according to different needs and materials. When using sandpaper, attention should be paid to selecting the appropriate particle size, correct usage methods, and safety measures to avoid damaging the material surface or causing personal injury.