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Table 4 Condensation for various extreme conditions of T and RH at room, canvas, cotton and aluminium in Case 2

From: RH simulation model for canvas paintings protected by an aluminium backplate and an additional hygroscopic layer

RH start

Location

Temp. average

∆T ± 

RH max

Temp. average

∆T ± 

RH max

Temp. average

∆T ± 

RH max

Temp. average

∆T ± 

RH max

%

°C

K

%

°C

K

%

°C

K

%

°C

K

%

52

Room

20

1

56

15

1

56

28

1

56

22

1

56

58.2

Canvas

19

2

66

14

2

65

26

2

66

20

2

65

 

Cotton

13

3.5

88

13

3.5

63

19

3.5

92

15

3.5

82

 

Alum

12

4

97

12

4

70

18

4

100

14

4

90

60

Room

20

1

64

15

1

64

28

1

65

22

1

64

50

Canvas

19

2

57

14

2

56

26

2

57

20

2

56

 

Cotton

13

3.5

75

13

3.5

55

19

3.5

79

15

3.5

71

 

Alum

12

4

83

12

4

61

18

4

87

14

4

78

70

Room

20

1

75

15

1

75

28

1

75

22

1

75

30

Canvas

19

2

36

14

2

35

26

2

36

20

2

36

 

Cotton

13

3.5

48

13

3.5

34

19

3.5

52

15

3.5

46

 

Alum

12

4

53

12

4

38

18

4

57

14

4

50

30

Room

20

1

32

15

1

32

28

1

33

22

1

32

70

Canvas

19

2

76

14

2

78

26

2

73

20

2

79

 

Cotton

13

3.5

100

13

3.5

76

19

3.5

100

15

3.5

99

 

Alum

12

4

100

12

4

84

18

4

100

14

4

100

70

Room

20

1

75

15

1

75

28

1

75

10

1

75

60

Canvas

19

2

68

14

2

67

26

2

69

8

2

64

 

Cotton

13

3.5

91

13

3.5

65

19

3.5

95

3

2.5

88

 

Alum

12

4

100

12

4

72

18

4

100

1

3

100

30

Room

20

1

32

15

1

32

10

1

32

5

1

32

30

Canvas

19

2

34

14

2

34

8

2

32

4

2

32

 

Cotton

13

3.5

45

13

3.5

33

2

2.5

47

0

2.5

34

 

Alum

12

4

50

12

4

36

0

3

58

− 2

3

52

  1. ∆T indicates the amplitude of the T fluctuations