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What properties of the grains affect the quality of abrasive paper?
1.Grain types: Different types of grains have different applicability and pertinence. In this case, choosing the right grains is very important. Apply good grains to poor quality material sanding and this might not show the good performance of the good grains. Therefore, to choose the correct and economical grains for the right work piece is very important.
2.Strength of the Grains: The strength of the grains has a huge effect on abrasive cloth and heavy-weight abrasive paper. There are obvious effects on medium and high density fiberboards. For light-weight abrasive belts and hand-sanding abrasive paper, there are not that many effects.
3.Self-sharpening of the grain: The grain will break itself during working and form a new angle. In this case, it can improve its sharpness. The self-sharpening depends on the variety and processing method of the grains.
4.Grain shape: Grains in acicular or flake shapes will be sharper but not wear resistant while equivalent shapes not that sharp but wear resistant.
5.Correctness of the grit: The quality of the grains has a great deal with grit. P100 grains are sharper than P120. Normally abrasive paper in grit P120 will use P120 grains. But some factories will use P100 grain. Therefore, judging the quality of the abrasive paper should be on the basis of same grit.

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