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Heritage Science
Fig. 1 | Heritage Science

Fig. 1

From: A study of the oxidation mechanism of the organic pigment indigo in grottoes murals by ozone under dark conditions

Fig. 1

a The Mural of Four Buddhas, the flotsam shown in the top left of this picture is the black flotsam produced by local people when they burn incense and worship; b The second Buddha from right to left in The Mural of Four Buddhas; c Conditions of off-site conservation of The Mural of Four Buddhas (darkness); d Exterior view of the location of Cave 3 in the Tiantishan Grottoes

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