In the sandblasting cleaning construction, it is necessary to choose the abrasive suitable for the engineering polishing requirements, so that the sandblasting residue will not damage the surface cleanliness. Sandblasting abrasives refer to minerals used for grinding and polishing. Commonly used sandblasting abrasives include:

     1 Copper slag  2 Garnet sand

      Abrasive characteristics

      When selecting the required abrasives, the respective characteristics must be considered. These characteristics include abrasive hardness, shape, size, chemical composition, cost and environmental factors.

     1.  Hardness

           Abrasive hardness: One way to determine the hardness of abrasives is the Mohs hardness scale. The hardness generally achieved is 7-8 mosh. These abrasives will not damage the surface of the product to ensure the surface finish.

    2.  Shape

          Abrasive shape: Abrasives with sharp edges and corners can remove substances or dirt attached to the product with the best effect.

    3.   Dimensions

          Abrasive particle size: 20-40 grade is suitable for general sandblasting purposes; 80-120 grade is used for polishing metal surfaces. Only a uniform grade of hard abrasive can guarantee the cleanliness of the product surface.

    4.    Chemical composition

           The chemical composition of the abrasive: Choosing an inappropriate abrasive for sandblasting will leave residues and damage the product.

    5.   Cost

         Abrasive cost: Generally speaking, the freight from the supplier to the construction site determines the choice of abrasive. Of course, the abrasive damage rate is also very important.

     6. Environmental Impact

         Environmental impact: Workers must use breathing equipment during sandblasting to reduce dust problems faced by workers.

        Abrasives on the market have their own advantages and disadvantages. There are many types of abrasives on the market, but the widely used abrasives are: garnet sand and copper slag sand.

       Copper slag sand: is the slag produced by smelting mineral products. Advantages: low price, economical and applicable abrasives. Disadvantages: A small amount of dust will be generated during use.

      Garnet sand: It is a natural "economically applicable" abrasive with a Mohs hardness of 7.5-8. Its particle size is widely used in the market because of its fast cutting speed and low dust.