Figure 3
From: Investigation of the stabilization of verdigris-containing rag paper by wet chemical treatments
Comparison between pure aqueous treatment and treatment using ethanol or a mixture of water and ethanol. Molar masses and carbonyl groups of the samples after thermally induced accelerated aging. The first test set (left, red) was treated with pure water or pure ethanol, and the second set (right, green) was treated with calcium hydrogen carbonate solution in water or in a mixture of water and ethanol (2:1) prior to accelerated aging. Spraying on a suction table was applied to all samples.