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Table 2 Summary table of analysis results of main coloring pigment and organic binding media

From: Pigments and binding media of polychrome relics from the central hall of Longju temple in Sichuan, China

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