Waterproof sandpaper has smaller gaps between sand grains, and the crushed particles are also smaller. When the sandpaper is used with water, the crushed particles will flow out with the water, so it is best to use it with water. If you use waterproof sandpaper for dry grinding, the crushed particles will remain in the gaps between the sand grains, making the surface of the waterproof sandpaper shiny and failing to achieve the desired effect.
Dry sandpaper is very convenient to use. The gaps between its sand grains are larger, and the crushed particles are also larger. During the grinding process, the crushed particles will fall off due to the large gaps, so it does not need to be used with water.
Role in industry and life:
Sandpaper is used to grind the surface of metal, wood and other materials to make them smooth and clean. It is usually made by gluing various abrasive grains on the base paper. According to different abrasive materials, there are many types of sandpaper, such as emery paper, artificial emery paper, and glass sandpaper. Wood sandpaper is used to polish the surface of wood and bamboo. Waterproof sandpaper is used to polish the surface of metal or non-metallic workpieces in water or oil. There is also a kind of self-adhesive sandpaper, which is made by gluing or flocking the back of the corresponding sandpaper or sandpaper, and then stamping and cutting it into a circle or other required shapes. It is widely used in the surface treatment of automobiles, furniture, metal products, electronic circuit boards and other products.
