Towards a restoration method for blackened minium
Restoration of lead-based paints by laser irradiation

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Towards a restoration method for blackened minium
Restoration of lead-based paints by laser irradiation

Authors : Sébastien AZE, Jean-Marc VALLET, Olivier GRAUBY, Vincent DETALLE, Philippe DELAPORTE

Publication date: May 10, 2013 | Lire en français

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2. Towards a restoration method for blackened minium

2.1 Thermal decomposition of plattnerite: a possible way forward

To restore the original appearance of blackened areas (figure 2), the principle of a restoration method must enable the plattnerite produced during pigment transformation to be converted into minium, according to the following reaction balance:

3β-PbO2→Pb3O4+O2

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