The service life of sandpaper varies depending on its quality and usage, usually depending on factors such as the type, density, hardness, and adhesive of the sand particles. The following are some common types of sandpaper and their approximate lifespan:


1. Sandpaper with high hardness and high roughness, such as P24-P40, is often used to remove thicker woodworking surfaces due to its rapid wear and tear. It can only be used once or a few times and needs to be replaced.


2. Sandpaper with moderate hardness and roughness, such as P60-P100, can be used to polish woodworking surfaces with moderate roughness, usually around 3-5 times.


3. Sandpaper with low hardness and fine sand particles, such as P120 and above, can be used to polish smoother surfaces, such as painted surfaces. This type of sandpaper is relatively durable and can be used multiple times.




Of course, the service life is also affected by the following factors:


1. Types of materials used: Different materials may require the use of sandpaper with different particle sizes and hardness, which can also affect the service life of sandpaper.


2. Strength and angle during use: Excessive use of force or incorrect angle can accelerate the wear of sandpaper.


3. Cleaning before and after use of sandpaper: Cleaning sandpaper can extend its service life and avoid using sandpaper with a large amount of dust and sawdust attached as much as possible.




In summary, the service life of sandpaper varies due to various factors. When using, it is necessary to choose appropriate sandpaper according to the specific situation, use and maintain sandpaper correctly, in order to extend its lifespan and achieve better usage effects.