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Table 2 Labelling of the surface conditions

From: Mi Fuma il Cervello” self-portrait series of Alighiero Boetti: evaluation of a conservation and maintenance strategy based on sacrificial coatings

Not treated surface NT
Surface protected with a coating cured at 50 °C P
Surface protected with a coating and artificially aged PA
Surface protected with a coating and aged. Calcareous deposit cleaned with EDTA poultice PAC
Surface protected with a coating and aged. Calcareous deposit cleaned with EDTA poultice and coating removed with acetone R