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Heritage Science

Table 1 Mass of the different pigments mixed with 0.45 g of oil binder and calculated experimental binder to pigment (B/Pexp) ratios ensuring equimolar metallic cation (ncation) concentrations in the formulated paint films

From: Formation of zinc oxalate from zinc white in various oil binding media: the influence of atmospheric carbon dioxide by reaction with 13CO2

Pigment Formula Mw (g/mol) m(g) pigment in 0.45 g oil npigment (mmol) ncation (mmol) B/Pexp B/Pref [24]
Zinc white ZnO 81.4 0.49 6.0 6.0 92 30
Lead white 2PbCO3·Pb(OH)2 775.6 1.55 2.0 6.0 29 10–15
Calcite CaCO3 100.1 0.60 6.0 6.0 75 –
Cobalt violet Co3(PO4)2 366.7 0.73 2.0 6.0 61 20–25
Verdigris Cu(CH3COO)2·H2O 199.7 1.20 6.0 6.0 38 –
Cadmium yellow CdS 144.5 0.87 6.0 6.0 52 30
Chrome yellow PbCrO4 323.2 1.94 6.0 6.0 23 20
Zinc yellow KZn2(CrO4)2(H3O2) 436.9 0.87 2.0 6.0 52 25–30
  1. Reference binder to pigment (B/Pref) values are given for comparison
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