The grid number (×10⁴)

d = 0, s = h = 0.05 mm

8.2

16.6

33.5

41

58

68

d = 0, s = h = 0.1 mm

9.1

15.2

30.1

45

55

66

d = 0, s = h = 0.15 mm

9.5

15.9

28

43

56

69

d = 0, s = h = 0.2 mm

8.6

17.5

32

38

54

71

d = 0, s = h = 0.3 mm

10.5

16

29

40

52

75

d = 0, s = h = 0.5 mm

9.3

14.3

29.5

43.8

59.6

68.9