Application of X-Ray Fluorescence Elemental Analysis for Mural Painting Restoration of “Otetele?anu“ Church in M?gurele (painted by Gh. T?tt?rescu)

摘要

Pigments used in 1853 by famous Romanian painter Gh. Tattarescu for oil mural painting and icons-iconostasis of Church St. Constantine and Helena located in M?gurele, Ilfov County analyzed using a portable X-Ray Fluorescence spectrometer are discussed. The chemical element predominant in all spectra for the red areas is mercury suggesting the pigment is cinnabar (HgS - mercury sulfide). In pink areas we detected Hg together with Pb, which means cinnabar was mixed with lead white – (PbCO₃)₂ ⋅ '> ? ? cdot Pb(OH)₂. Yellow pigment was made from a mixture of chrome-yellow (PbCrO₄) and ochre (Fe based yellow ochre – Fe₂O₃ ⋅ '> ? ? cdot H₂O, – hydrated iron oxide). In a blue area (an iron-based pigment – very probably Prussian blue – Fe₇(CN)₁₈ ⋅ '> ? ? cdot H₂O) we detected the presence of zinc suggesting a late repainting with zinc white (ZnO) on the original lead white layer.