Construction of Spectral Discoloration Model for Red Lead Pigment by Aging Test and Simulating Degradation Experiment

Table 1

Statistical results of spectral measurement accuracy, repeatability, and consistency of Color-Eye 7000A spectrophotometer and PR705 spectroradiometer.

	RMS (%)	Red	Green	Blue	Yellow	Magenta	Cyan
7000A	Mean	0.34	0.35	0.44	0.35	0.46	0.37
	Max	0.49	0.54	0.69	0.72	0.71	0.61
	Min	0.22	0.22	0.22	0.31	0.34	0.21
PR705	Mean	0.37	0.38	0.49	0.42	0.49	0.42
	Max	0.56	0.66	0.68	0.69	0.81	0.76
	Min	0.26	0.21	0.24	0.33	0.37	0.23
PR705 versus 7000A	Mean	0.44	0.42	0.47	0.42	0.53	0.41
	Max	0.79	0.81	0.78	0.82	0.85	0.78
	Min	0.36	0.34	0.37	0.32	0.39	0.36