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Heritage Science

Table 8 Spectrophotometry results in the old canvas

From: Powdered cellulose microblasting: a useful technique for dry-cleaning the reverse side of canvas paintings

 

Mean L*(D65)

Std. dev. L*(D65)

Mean a*(D65)

Std. dev. a*(D65)

Mean b*(D65)

Std. dev. b*(D65)

Before Arbocel®

55.41

0.06

5.38

0.10

21.44

0.12

After Arbocel®

62.07

0.10

5.36

0.17

25.95

0.11

Changes Arbocel®

6.65

 

− 0.02

 

4.51

 

Before Milan®

54.77

0.21

4.75

0.13

19.56

0.19

After Milan®

60.26

0.16

4.51

0.08

24.14

0.11

Changes Milan®

5.50

 

− 0.24

 

4.58

 

Before Akapad®Soft

54.58

0.30

4.58

0.13

19.68

0.23

After Akapad®Soft

59.99

0.23

4.79

0.07

25.63

0.15

Changes Akapad®Soft

5.40

 

0.21

 

5.95

 

Before Smoke Sponge

54.91

0.47

4.68

0.16

21.33

0.37

After Smoke Sponge

59.41

0.16

4.66

0.07

26.35

0.21

Changes Art Sponge®

4.50

 

− 0.02

 

5.02

 
  1. Changes in L*(D65) and b*(D65) after cleaning the old canvas (emphasised in bold). The various shades of grey range from more luminosity (lighter grey) to less luminosity (darker grey) in the first graph and from less yellow (light grey) to more yellow (dark grey) in the second
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