Heritage Science

Table 2 The color difference values of different samples

From: Quantitative analysis of mixed pigments for Chinese paintings using the improved method of ratio spectra derivative spectrophotometry based on mode

Pigment sample	dE	\|ΔE\|
100% Azurite	1.3930
95% Azurite + 5% Clam white	2.5022	1.1092
90% Azurite + 10% Clam white	3.0926	0.5904
85% Azurite + 15% Clam white	7.4090	4.3164
80% Azurite + 20% Clam white	6.7337	0.6753
75% Azurite + 25% Clam white	9.6276	2.8939
70% Azurite + 30% Clam white	14.3638	4.7362
65% Azurite + 35% Clam white	17.0600	2.6962
60% Azurite + 40% Clam white	18.3329	1.2729
55% Azurite + 45% Clam white	19.7251	1.3922
50% Azurite + 50% Clam white	22.2750	2.5499
45% Azurite + 55% Clam white	24.6349	2.3599
40% Azurite + 60% Clam white	26.6438	2.0089
35% Azurite + 65% Clam white	28.1206	1.4768
30% Azurite + 70% Clam white	30.9318	2.8112
25% Azurite + 75% Clam white	39.0648	8.1330
20% Azurite + 80% Clam white	39.3548	0.2900
15% Azurite + 85% Clam white	41.4790	2.1242
10% Azurite + 90% Clam white	51.2923	9.8133
5% Azurite + 95% Clam white	56.2340	4.9417
100% Clam white	67.3164	11.0824

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