What is Grit Paper?

According to different abrasive materials, there are a variety of emery paper, artificial emery paper, glass sandpaper and so on. Dry sandpaper (wood sandpaper) is used to polish the surface of wood and bamboo. Water-resistant sandpaper (water sandpaper) is used to polish the surface of metal or non-metallic workpieces in water or oil.

In actual use, the classification of sandpaper is not uniform.

Commonly used are 400 # 600 # 1000 # 1200 # 1500 # 2000 #.

For example, W10 stands for No. 04 sandpaper, 800 mesh. The specifications of other types of sandpaper are compared as follows:

Abrasive, micron particle size number	Sandpaper code	Size range (m)
280	1	~ 40
320 (M40 or W40)	0	40 28
400 (M28 or W28)	1	28 20
500 (M20 or W20)	2	20 14
600 (M14 or W14)	3	14 10
800 (M10 or W10)	4	10 7
1000 (M7 or W7)	5	7 5
1200 (M5 or W5)	6	5 3.5
1400 (M3.5 or W3.5)	7	3.5 3.0
1600 (M3 or W3)	8	3.0 2.5
1800 (M2.5 or W2.5)	9	2.5 2.0
2000 (M2 or W2)	10	2.0 1.5
2500 (M1.5 or W1.5)		1.5 1.0
3000 (M1 or W1)		1.0 0.5
3500 (M0.5 or W0.5)		0.5 finer
4000 (M0.1 or W0.1)

* The particle size number is expressed by mesh or particle size, and is the number of particles in an area of 1 inch * 1 inch.

Example: 1000, which means that the sand grain size is 25.4 microns.