Table 2 EDX results of the plaster samples and the priming layer (wt %)

Gx-1 1st coarse layer

3.27

31.73

—

—

12.78

38.62

—

2.39

0.66

—

10.54

Zx 1–3 1st coarse layer

4.04

37.40

0.63

1.07

10.02

36.50

—

2.40

—

1.47

6.48

Gx-2 2nd coarse layer

5.98

31.43

—

1.47

13.05

32.13

—

3.26

2.09

0.85

9.74

Zx 1–2 2nd coarse layer

3.79

34.29

0.49

1.53

12.45

33.85

—

3.37

—

0.89

9.36

Zb 3–2 2nd coarse layer

2.92

31.26

1.26

1.73

11.94

30.71

2.99

3.08

3.80

—

10.30

Gx-3 fine layer

7.68

41.27

—

1.07

4.00

9.01

1.13

0.97

32.06

—

2.83

Zx 1–1 fine layer

7.41

40.48

0.41

1.34

4.42

12.37

—

1.17

29.04

—

3.35

Zb 3–2 fine layer

6.08

35.88

0.80

1.68

6.15

14.05

1.30

1.03

27.96

—

5.07

Zx 1–9 surface of fine layer

10.33

37.49

—

0.65

1.78

3.93

2.52

—

42.13

—

1.18

Zx 2–5 surface of fine layer

9.30

37.25

0.40

0.57

1.92

5.87

0.82

0.63

42.13

—

1.11