Sandpaper is a material for grinding. Sandpaper is used to polish surfaces such as metal and wood to make it smooth. Sandpaper is usually made of various kinds of abrasive grains on the base paper.

According to different abrasive materials, there are various kinds of emery paper, artificial emery paper, glass sandpaper and the like. Dry sandpaper (wood sandpaper) is used to polish wood and bamboo surfaces. Water-resistant sandpaper (water sandpaper) is used to polish metal or non-metallic workpiece surfaces in water or oil.

The base paper was all copied from unbleached kraft pulp. The paper is tough, wear-resistant, and has good water resistance. The polishing material such as glass sand is adhered to the base paper with an adhesive such as gum and dried.

According to the purpose:

Sponge sandpaper: suitable for polishing smooth parts, all kinds of materials can be.

Dry sanding paper: suitable for roughing or grinding some rough things, such as iron pipe metal.

Water-sanded paper: The texture is relatively fine, and the water-sanded paper is suitable for polishing some fine textures, and is suitable for post-processing;

Water sandpaper has a small gap between the sand grains, and the ground debris is also small. When used together with water, the powder will flow out with the water, so it should be used together with water. If it is dry sanded with water sandpaper, Will stay in the gap of the sand, so that the surface of the sandpaper is dimmed to achieve its original effect, and the dry sandpaper is not so troublesome, the gap between the sand grains is larger and the broken ends are larger. It will fall off during the grinding process due to the large gap, so it does not need to be used with water.

According to the product name:

Wood sandpaper, that is, dry sanding paper; water sandpaper, that is, water-resistant sandpaper; iron sand cloth, which is a kind of dry sanding paper, which is thicker and can polish the metal surface as soon as possible.

Water-resistant sandpaper, also known as water-sand paper, is named because it can be immersed in water or polished in water. The water-resistant sandpaper is based on water-resistant paper or treated water-resistant paper. Paint or resin is used as a binder to corundum. Or an abrasive tool made of a silicon carbide abrasive firmly adhered to a substrate, and has a shape of a sheet or a roll.

Water sandpaper features:

  1. It is produced by linkage line and has high efficiency;

  2. Since the water-resistant sandpaper uses varnish as a binder, the drying time is long, and the drying method is generally suspended drying;

3. Water-resistant sandpaper generally has a finer particle size. The particle size of China's water-sandpaper is from P80, and the fine-grained grain is bonded to the grain of the metallographic sandpaper.

4. Water-resistant sandpaper is generally sanded under water conditions, so the dust is less and the working conditions are good.

According to the abrasive material:

Brown corundum sandpaper; white corundum sandpaper; silicon carbide sandpaper; zirconium corundum sandpaper.

According to the binder:

Ordinary binder sandpaper; resin binder sandpaper.

There are also coarse sandpaper and fine sandpaper.