Used for grinding metal, wood equal surface to make it smooth and smooth. 

Usually in base paper glue all kinds of grinding sand made.

According to different grinding materials, there are many kinds of emery paper, artificial emery paper, glass paper, etc. Dry grinding sandpaper (Wood sandpaper) for polishing wood, bamboo articles surface. Water resistant sandpaper ( waterproof abrasive paper) used in water or oil medium polished metal or non-metallic workpiece surface. Base paper all used unbleached kraft wood pulp copy. Paper is tough, wear-resistant and folding-resistant, and has good water resistance. 

Will glass sand for Abrasive Materials gum etc. Adhesive stick to base paper and dry abrasive paper after drying: suitable for rough machining or grinding some rough things, such as iron pipe metal, etc.

Waterproof abrasive paper: The texture is relatively fine, waterproof abrasive paper is suitable for polishing some things with delicate texture, and is suitable for post-processing; Waterproof abrasive paper the gap between its sand grains is small, and the grinding smashing device is also small, when used with water, smashing device will flow out with water, so use with water. If you dry grind with waterproof abrasive paper, smashing device will stay in the gap of sand particles, the surface of sandpaper is dimmed to achieve its original effect, while dry sandpaper is not that troublesome, the gap between its sand grains is relatively large, and the grinding smashing device is also relatively large. During the grinding process, smashing device will fall down due to the large gap, so it does not need to be used with water.

According to the product name:

wood sandpaper, namely dry grinding sandpaper; Waterproof abrasive paper, namely water resistant sandpaper waterproof abrasive paper; Iron emery cloth, is a kind of dry grinding sandpaper, which is thicker and can polish the metal surface as soon as possible.

According abrasive points: Brown fused alumina sandpaper; White fused alumina sandpaper; silicon carbide sandpaper; Fused Zirconia alumina sandpaper, etc. According binder points: ordinary binder sandpaper; resin binder sandpaper.

There are also flint glass paper and fine sandpaper.