Page 330 - Copper and Bronze in Art: Corrosion, Colorants, Getty Museum Conservation, By David Scott

(2°,D65 )
Sample no. 193
L * 49.12
a* - 2 6 . 0 6
b* 24.21
J L * -50.8 8
J a* - 2 6 . 2 1
j b * 24.21
J E * 62.08
Target no. 1
L * 100.00
a* 0.00
b* 0.00

Scheele's green in gum arabic

(2°,D65 )
Sample no. 79
L * 56.39
a* -52.2 6
b* 14.07
J L * -43.6 1
J a* -52.2 6
Jb* 14.07
J E * 69.50
Target no. 5
L * 100.00
a* 0.00
b* 0.00

Schweinfurt green in gum arabic on card

(2°,D65 )
Sample no. 86
L * 42.34
a* -18.4 8
b* 24.73
J L * -57.6 6
δ a* -18.4 8
j b * 24.73
J E * 65.40
Target no. 5
L * 100.00
a* 0.00
b* 0.00

Copper orthoarsenite in gum arabic on card

F I G U R E 9.3 Color reflectance data for A , Scheele's green in gum arabic;
B, Schweinfurt green in gum arabic; and c, copper orthoarsenite in gum arabic.