Sandpaper is composed of sand grains and paper, and the specification generally indicates the size and shape of the paper. Common specification types are round, rectangular, triangular shapes, as well as various sizes.
1. Know the sandpaper specifications
When selecting the specification, it is necessary to choose according to the size of the item to be processed and the working scene. For example, processing small objects, you can choose a small size sandpaper, easy to operate; When processing large objects, it is necessary to choose a large size sandpaper to improve efficiency.
2. Know the granularity of sandpaper
The granularity of the sandpaper indicates the size of the sand grain, and the unit is generally the number of mesh. The larger the number of mesh, the finer the sand, and the smoother the surface treatment effect. Generally, the granularity of sandpaper is divided into the following categories: 60 mesh sandpaper, 80 mesh sandpaper, 120 mesh sandpaper, 180 mesh sandpaper, 240 mesh sandpaper, etc.
Need to choose different granularity sandpaper according to different items to be processed. Coarse sandpaper is suitable for removing large defects and residues; Medium sandpaper is suitable for leveling the surface and removing rough defects; Fine sandpaper can smooth the surface.
3. Choose the right sandpaper
When choosing sandpaper, you need to first understand the situation of the item to be processed, such as metal, wood or ceramic. Each material has different hardness and ductility, so it is necessary to choose the right sandpaper to avoid over - or under-filing.
For example, for wood, it is recommended to use coarse sandpaper (60 mesh, 80 mesh) to remove burrs, scratches and other rough parts, and then use medium sandpaper (120 mesh, 180 mesh), and finally use fine sandpaper (240 mesh or more) for grinding. This results in a smooth surface.
4. Precautions
The following points need to be noted in the process of using sandpaper:
(1) Sandpaper should be kept flat and dry. It is best to use dry sandpaper for processing metal, which can avoid rust due to humidity.
(2) Reasonable use of sandpaper. Do not blindly use fine sandpaper for grinding, and do not overuse coarse sandpaper for filing, so as not to damage the processed items.
(3) Sandpaper should be replaced regularly. For frequently used sandpaper, such as 60 mesh, 80 mesh, it is recommended to replace it regularly to maintain the processing effect.
(4) Personal protection measures. Wear protective measures such as gloves and masks when using sandpaper to protect your health.
conclusion
Choosing the right sandpaper specification and granularity can greatly improve the processing efficiency and effect, but also can protect the processed items, make it smooth and beautiful. In actual work, it is necessary to choose the appropriate sandpaper type and granularity according to the processing needs, and pay attention to the use of details and personal protective measures, so as not to bring harm to yourself.
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