Table 2 Summary table of analysis results of main coloring pigment and organic binding media
Number | Surface colors | Substrate | Main coloring pigment (chemical formula) | Main element content characterized by EDS (wt%) | Organic binding media |
|---|---|---|---|---|---|
LJ01 | Green | Wall | Atacamite (Cu2(OH)3Cl) | O (59.7), Ca (16.9), S (14.3), C (7.0), Cu (1.4) | Animal glue |
LJ02 | Wood | Atacamite (Cu2(OH)3Cl) | O (37.6), Cu (25.5), S (23.6), C (7.4) | Casein | |
LJ03 | Wood | Atacamite (Cu2(OH)3Cl) | O (41.3), C (29.1), Ca (8.7), S (8.3), Si (4.7), Cu (3.2) | Negative | |
LJ04 | Blue | Wall | Azurite (Cu2(OH)2CO3) | O (44.8), C (26.9), Cu (6.5), Ca (6.0), S (5.7), Si (4.9) | Egg white |
LJ05 | Black | Wall | Carbon black (C) | O (38.1), C (33.0), Ca (8.6), Pb (7.2), Si (4.5) | Negative |
LJ06 | Red | Wood | Cinnabar (HgS) | C (40.9), O (27.0), S (13.0), Hg (6.8) | Negative |
LJ07 | Wood | Cinnabar (HgS) | C (35.0), O (31.0), Hg (19.4), S (4.0), Si (3.2), Ca (3.1) | Egg white, animal glue | |
LJ08 | Aureate | Wall | Gold (Au) | C (39.2), O (27.5), Au (10.9), S (9.1), Si (4.1), Ca (3.2) | Animal glue |
LJ09 | Wood | Gold (Au) | C (46.8), O (27.0), S (6.9), Si (4.9), Ca (4.0), Au (3.9) | Animal glue | |
LJ10 | Wall | Gold (Au) | C (34.8), O (24.7), Pb (11.1), Au (10.8), Si (4.6), Ca (4.2), S (3.0) | Animal glue |