Category (granulometric cut)

Class (particles shape)

Length (μm)

Diameter (μm)

Shape factor (L/D)

Large

Pg > 1.6 mm

Large particles

4072 - 8643

1904 - 2977

2.59 - 4.54

Medium

1.6 mm > Pm > 0.25

Medium size particles

1500 - 5344

626 - 1436

3.16 - 5.48

Fine

Pf < 0.25

Fine particles

677 - 2236

84 - 538

4.80 - 5.21

Large

Pg > 1.6 mm

Long fibers

12,627 - 18,877

57.69 - 219

39 - 152

Medium

1.6 mm > Pm > 0.25

Medium fibers

6708 - 8964

50 - 176

46 - 89

Fine

Pf < 0.25

Short fibers

2042 - 2133

50 - 119

30 - 36