The difference between Dry sand paper and waterproof sand paper
As sand paper is widely used in polishing and grinding field, there are 2 kinds of sand paper, which are quite popular, one is dry sand paper and another is waterproof sand paper.
Today we will try to figure it out the main difference between them.
About abrasives grain, the grit of waterproof sand paper can reach 7000, but the dry sand paper can not be over 1000. According to the names, waterproof sand paper can be used with water, from my point of view, when polishing workpiece, water is quite important to get rid of heat, it will not easy to hurt iron and metal etc. Well the dry sand paper definitely can not be used with water.
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