Calcium Hydroxide Nanoparticles and Hypogeum Environment: Test to Understand the Best Way of Application

Table 3

Colorimetric measurements. Δ𝐸 after every treatment compared to the nontreated sample.

Laboratory treatments	Ochre			Cinnabar
	Δ𝐸1	Δ𝐸2	Δ𝐸3	Δ𝐸1	Δ𝐸2	Δ𝐸3
Treatment 1 : 15	0.4	0.6	0.9	0.3	1.4	1.9
Treatment 1 : 10	0.6	0.9	1.1	0.6	2.5	2.8
Treatment 1 : 5	0.3	1.5	2.6	0.5	3.7	3.9
Gradual treatment	0.2	0.4	0.8	0.4	1.0	1.6
Catacomb treatments	Ochre			Cinnabar
	Δ𝐸1	Δ𝐸2	Δ𝐸3	Δ𝐸1	Δ𝐸2	Δ𝐸3
Treatment 1 : 15	0.7	1	0.5	1	1.1	1.2
Treatment 1 : 10	0.2	0.9	0.4	1.3	1.5	1.5
Treatment 1 : 5	0.4	1.2	1.1	1.5	1.9	1.9
Gradual treatment	0.5	0.6	0.8	1.8	1.2	0.4