The Usage And Precautions Of Waterproof Sandpaper And The Correct Way Of Grinding
1. The usage of water abrasive paper
Many items in life need to be finely polished to form, such as leather, wood, metal, etc. Water abrasive paper is often used to polish these items. How to use water sandpaper? There are two main usages of water sandpaper:
1). Use directly in water
When grinding relatively small items, you can directly put the items in the water, and water while grinding, so that the items are cleaned every time you grind, It is clean and the work efficiency is relatively fast.
2). Slowly add water to use
When the object to be polished is relatively large, especially if it is inconvenient to put it in water like furniture, when grinding, first use sandpaper with larger grains to roughen it, and then use water sandpaper to dip it in water for fine grinding, and then slowly add water when the water is gone.
2. Matters needing attention in the use of water sandpaper 
1). Water sandpaper needs to be polished with water, not dry grinding. If it is directly dry-grinded, the debris of the sanded object will adhere to the gap between the sand grains of the water sandpaper, resulting in friction of the water sandpaper.
The weakening of force and grinding force will not only affect the effect of sanding but also cause the water sandpaper to be damaged more easily.
2). There are different types of water abrasive paper. When grinding, you should first use a relatively small type of coarse sandpaper and slowly increase the size of the large type of water abrasive paper to perform polishing again and again.
3). Be patient when grinding, because the same place needs to be ground ten times back and forth, and the model of water grinding paper needs to be changed every time after grinding, just brush the place where it was ground.
3. The correct method when sanding with water sandpaper
When sanding with water sandpaper, in addition to paying attention to the correct use method, you should also pay attention to the way of sanding with water sandpaper:
1). Wear gloves, hold the water sandpaper with your hands, and put it close to the surface of the object to be polished. When grinding, grind in one direction. Wooden products also need to be polished in the direction of the wood grain.
2). Pay attention when sanding with water sandpaper. It is not advisable to stay in one place for too long to avoid excessive sanding. If the sanding effect is not good, you can consider replacing it with another place, a model of sandpaper.
3). When using water sandpaper to polish, it is necessary to polish the first few times. It is necessary to smooth the base so that the subsequent fine grinding can play a better role. Therefore, the first few times of grinding should pay special attention to the correct technique.
