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Heritage Science
Fig. 4 | Heritage Science

Fig. 4

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

Fig. 4

FTIR-ATR spectra of zinc white in standoil (B/P = 30) samples mixed with an equivalent mass of 10% (w/w) solution of: (e) dammar in mineral turpentine, (f) shellac in ethanol, (g) pine colophony in ethanol, after treatment in the Weather-O-Meter for 300 h and RH = 80%. The top spectrum in each figure (e–g) shows the measurement on the surface of the oil film while the spectrum below was taken at the surface of the oil film before treatment. Green lines indicate characteristic zinc oxalate IR absorption bands

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