Depending on the binder, the binder for water sandpaper is paint or resin, and the binder for dry sandpaper is animal glue.
The gap between the sand grains of the water sandpaper is small, and the grinding powder is also small. abrasive disc When it is used with water, the powder will flow out with the water, so it should be used with water.
If the water sandpaper is used for dry grinding, the dust will remain in the gaps between the sand grains, which will dull the surface of the sandpaper and fail to achieve its original effect.
The dry sandpaper is not so troublesome. The gap between the sand grains is large, and the grinding powder is also large. During the grinding process, the powder will fall off due to the large gap, so it does not need to be mixed with water. use.
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What are the common types of sandpaper?