Waterproof sandpaper, also known as water-abrasive sandpaper or water sandpaper, is named because it can be immersed in water or polished in water when used. Waterproof sandpaper is made of water-resistant paper or treated water-resistant paper as the base, paint or resin as the binder, and corundum or silicon carbide abrasives are firmly bonded to the base. It is a kind of abrasive tool, which has two shapes: page and roll.
Its characteristics are:
1. It adopts linkage production line, which is more efficient;
2. Since waterproof abrasive paper uses varnish as a binder, it takes a long time to dry, and its drying method generally adopts hanging drying;
3. Waterproof sandpaper generally has a finer particle size, and the particle size of water sandpaper starts from P80, and the fine particle size is connected with the particle size of metallographic sandpaper.
4. Waterproof abrasive paper is generally polished under water conditions, so there is less dust and good working conditions.
Waterproof sandpaper is used in water or with water. It cannot be dry-ground. All sandpapers must be cut into pieces of about 60x30 mm. Generally, when grinding stones, find a flat surface of the stone (if the surface of the stone is not flat enough, you can go to the hardware store to buy iron sandpaper and grind it flat. The iron sandpaper particles are relatively large and are used for coarse grinding. It must be dry-ground. The waterproof abrasive paper particles are small and are used for fine grinding. It is used with water). Use waterproof sandpaper and water to grind, starting from the coarsest. The waterproof sandpaper with the smallest number is the coarsest, which is generally 320. One place needs to be ground back and forth dozens of times, then 600, then 800, and so on, until it is water-ground to 5000. Every time you change the sandpaper, you must thoroughly rinse and clean the stone with water again, and use a toothbrush to brush off the dirt in the concave and corners before you can use finer sandpaper.
5000 sandpaper can be cut into this size or slightly larger, folded, and rubbed against each other until the surface is smooth and the sandpaper is soft. This kind of sandpaper is called polishing sandpaper. After the stone has gone through all the water grinding procedures, dry the stone and use this to polish it. Dry rubbing is very effective. Although it is very tiring, you will feel a sense of accomplishment after grinding. A good stone will be as smooth as a mirror.
