How do you get the sand on the sandpaper?

Update:05 Aug 2021
Summary:

Woodworking is one of the oldest crafts in China. Start […]

Woodworking is one of the oldest crafts in China. Starting from the ancestor Luban, the development of woodworking in all dynasties is the same. Woodworking contains the most primitive craftsman spirit and wisdom in China, and it has left us with a few simple tools. One by one architectural heritage.
As the saying goes, "three divisions, seven divisions grinding" grinding is the most important step in the processing of wood products. The earliest record is that it was dried and preserved with a horsetail grass. When used, it was soaked with water to restore its straightness, and the burrs on the surface were all Open, used to polish the surface of wood products without damaging the texture. It is a natural and environmentally friendly polishing material. It is also crushed with blue bricks and filtered with cloth. The filtered muddy water is precipitated and dried to form ultra-fine blue bricks. It can be used for polishing, as well as fur and shells. These inventions are the wisdom of the ancients.
In modern times, abrasive products are basically inseparable from sandpaper. Sandpaper is a material used for grinding. It can be used to polish wood and metal surfaces to make the surface smooth and flat. It is usually made by bonding abrasives on paper. Choose different sandpapers according to different abrasive materials.
Types of sandpaper
Sandpaper can be divided into sandpaper and sanding belt according to its shape. Sandpaper is like the paper we use and can be torn directly by hand. The reverse side of the sanding belt is generally cloth, which is suitable for use with sanding machines and is more durable. According to different abrasive materials, it can be divided into dry sandpaper, water sandpaper and sponge sandpaper.
Dry sandpaper is also called dry sandpaper. It uses synthetic resin as a binder to paste silicon carbide particles on the latex paper. The gap between the sand particles is large, and the grinding debris will fall off automatically, which is not easy in the sanding process. Clogging affects sanding. It is suitable for sanding metal surfaces, wood surfaces, putty and coatings. Dry sandpaper is generally made of special kraft paper or latex paper.
Water sandpaper is also called water sandpaper. Water resistant sandpaper. The abrasive material is silicon carbide. The paper base is usually kraft paper. The texture of water sandpaper is relatively small. The gap between fine sand grains is smaller, and the grinding debris particles are also smaller, together with water. The used debris will be washed out, so as not to affect the sharpness of the sand grains. Water sandpaper is suitable for sanding things with finer texture and suitable for post-processing. It is used in stone sanding, metal processing, abrasive processing, automobile polishing and other industries.
Sponge sandpaper is also called sponge sand block. It is based on a sponge and has abrasive sand particles implanted on the sponge. It is characterized by softness and elasticity, strong water absorption, and reusable. It is widely used in solid wood processing and metal stainless steel processing. Grinding and polishing of machinery manufacturing and other surfaces.