From: “Mi Fuma il Cervello” self-portrait series of Alighiero Boetti: evaluation of a conservation and maintenance strategy based on sacrificial coatings
Ca2+
48.6
Mg2+
29.4
Na+
5.8
K+
1
HCO3 −
301
SO4 2−
4.1
Cl−
2.4
NO3 −
8.5
F−
0.15
SiO2
15.2