From: Quantitative analysis of mixed pigments for Chinese paintings using the improved method of ratio spectra derivative spectrophotometry based on mode
Sample ratios
Orpiment
10%
25%
50%
75%
90%
Azurite
Ratios by RSDSM
20%
30%
70%
94%
80%
6%
Error
0.00
0.05
0.20
0.04
RMSE
0.0685