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Table 1 pXRF non-destructive testing location and micro-destructive sampling information

From: Blue pigments in Cave 256, Mogao Grottoes: a systematic analysis of murals and statues in Five dynasties, Song Dynasty and Qing Dynasty

No.

Location and color

Dynasty

Sample property

Analytical methods

M256-01

The bottom layer of the damaged part of the north wall of the main room. Blue

The Five Dynasties

Powder

pXRF, XRD and PLM

M256-02

The bottom layer of the damaged part of the east wall of the main room. Blue

The Five Dynasties

pXRF

M256-03

The third Donor Portraits ears from the west on the south wall of the tunnel. Dark blue

Song Dynasty

Powder + block

pXRF and XRD

μ-FTIR and PLM

M256-04

The third Donor Portraits costume from the west on the south wall of the Tunnel. Blue

Song Dynasty

Powder

pXRF and XRD

M256-05

Next to sample M256-04. Green

Song Dynasty

Powder

XRD

M256-06

Head halo of Thousand-Buddha on the east wall of the main room. Blue

Song Dynasty

pXRF

M256-07

Left knee of the Buddha statue in the main room. Blue

Qing Dynasty

Powder

pXRF, XRD, μ-FTIR, PLM and ED-XRF

  1. – means that no sampling