Heritage Science

Table 5 Colorimetric differences (ΔL, Δa, Δb) and total color difference (ΔEab)

From: Desalination of Hamipterus tianshanensis fossil by electrokinetic method: evaluation for treatment of clay-rich sandstone

	EMI	EMS	EPI	EPS
ΔL*	5.95	14.03	−1.28	6.91
Δa*	−0.05	−2.26	−0.44	−0.65
Δb*	0.12	−8.31	0.26	−1.52
ΔE*ab	5.95	16.46	1.38	7.10
Risk	H	H	L	H

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