Preliminary storage (1 day in wet conditions + 6 days under water coating)

The following storage

28 days in water

28 days in Na₂SO₄

Reference sample

1.00^*

0.69

0.16

1.02

1.09

0.29

1.96

0.68

0.16

Al(OH)₃

1.37

1.31

0.26

1.40

1.72

0.42

3.14

0.81

0.11

Al₂(SO₄)₃

2.46

0.92

0.17

2.52

1.25

0.36

3.92

0.78

0.08

Al₂(SO₄)₃ + FeSO₄

1.59

0.47

0.20

1.53

0.95

0.22

3.17

0.13

0.00