Identification of reaction compounds in micrometric layers from gothic paintings using combined SR-XRD and SR-FTIR.
Synchrotron radiation X-ray diffraction (micro-SR-XRD) and Fourier transform infrared spectroscopy (micro-SR-FTIR) are used in the non-destructive identification of reaction and aging compounds from micrometric ancient painting layers. The combination of the micrometer size and non-destructive nature of the techniques together with the high resolution and brilliance of the synchrotron radiation has proved to be a procedure most advantageous for the study of reaction, aging and degradation processes. Copper, lead and calcium carboxylates and oxalates are determined in the chromatic, preparation and alteration layers from 15th century egg tempera and oil paintings. Their nature and crystallinity have been assessed. Some hypothesis about the mechanisms of development of both carboxylates and oxalates are presented.
Salvadó
Nati
N
Dpt. d'Enginyeria Química, EPSEVG, Universitat Politècnica de Catalunya, Av. Víctor Balaguer s/n, 08800 Vilanova i la Geltrú, Barcelona, Spain. nativitat.salvado@upc.edu
Butí
Salvador
S
Nicholson
James
J
Emerich
Hermann
H
Labrador
Ana
A
Pradell
Trinitat
T
D002264:Carboxylic Acids / Q000032:analysis; D049668:History, 15th Century; D010070:Oxalates / Q000032:analysis; D010150:Paint / Q000032:analysis*; D010151:Paintings; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
D002264:Carboxylic Acids; D010070:Oxalates