Item

Standard

Result

Specific gravity(g/cm3)

2.4--2.6

2.54

Refractive index

≥1.5

1.52

Spherical beads (%)

>80

82.5

JIS R3301-1

Diameter (μm)

Standard Retain (%)

 >= 850

0

600--850

5--30

300--600

30--80

106--300

10--40

<= 106

0--5

JIS R3301-2

Diameter (μm)

Standard Retain (%)

>= 600

0

300--600

40--90

<= 150

0--5

JIS R3301-3

Diameter (μm)

Standard Retain (%)

>=212

0

<=90

0--4