9 documents found, page 1 of 1
Microanalytical study of the fresco ‘the good and the bad judge’ in the medieva...
Gil, M.; Araujo, C.; Carvalho, M.L.; Longelin, S.; Dias, L.; Valadas, S.; Souto, C.; Frade, J.; Ribeiro, I.; Mirao, J.; Candeias, A.This article describes a study carried out on the emblematic mural painting so-called ‘fresco of the good and bad judge’ located at the medieval village of Monsaraz (southern Portugal). This painting, with two distintic narratives, is thematically unique in Portugal and rare in the context of European Renaissance art. Scientific research was undertaken to clarify doubts about the chronology of the two painted s...
Analytical studies of 19th century photographs by non-destructive techniques
Peres, M.; Costa, F.M.; Gomes, A.; Jardim, M.E.; Ferreira, T.; Dias, L.; Mirão, J.; Carvalho, M.L.The late 19th century photographs are chemically a multilayer material of inorganic and organic compounds. A wide variety of chemical composition can be observed as consequence of the large number of photographic processes and products that were used as well as due to the ageing effects. The knowledge of the chemical composition of a photographic print can be very useful in determining its age and authenticity ...
Study of Mural Paintings Using In Situ XRF, Confocal Synchrotron-m-XRF, m-XRD, ...
Valadas, S.; Candeias, A.E.; Mirão, J.; Tavares, D.; Coroado, J.; Simon, R.; Silva, A.S.; Gil, M.; Guilherme, A.; Carvalho, M.L.In this work, we present the results of an analytical method developed for detailed pigment identification, stratigraphy, and degradation of the paint layers of mural paintings applied in the study of the 17th century frescoes from the Misericordia Church of Odemira ~Southwest Portugal!. In situ X-ray fluores- cence spectrometry analyses were performed on three panels of the mural paintings and complemented by ...
Blue Pigment Colors from Wall Painting Churches in Danger (Portugal 15th to 18t...
Gil, M.; Carvalho, M.L.; Longelin, S.; Ribeiro, I.; Valadas, S.; Mirão, J.; Candeias, A.Samples of blue wall paint layers from selected 15th to 18th century religious mural paintings from southern Portugal (Alentejo) have been analyzed using a multi-analytical methodology involving the combination of in situ visible spectro-colorimetry with microanalytical techniques such as optical and scanning electron microscopy and Raman spectroscopy. In situ analyses and micro-sampling were carried out in nin...
Limewashing paintings in Alentejo urban heritage: pigment characterization and ...
Gil, M.; Carvalho, M.L.; Seruya, A.; Queralt, I.; Candeias, A.E.; Mirao, J.Pigments used in traditional limewashing paintings in Alentejo urban Heritage are inorganic materials and can be grouped into four categories: a) reds – red ochre (from terras rossas, red schists and iron ore deposits weathering), almagres,terra roxa (natural processed red ochres) and synthetic red iron oxides; b) yellows – yellow ochre (from schists and iron ore deposits), processed natural ochres, yellow iron...
Pigment characterization and state of conservation of an 18th century fresco in...
Gil, M.; Carvalho, M.L.; Seruya, A.; Ribeiro, I.; Alves, P.; Guilherme, A.; Cavaco, A.; Mirao, J.; Candeias, A.This article describes a study carried out on a mural painting in the Convent of Santo Antonio dos Capuchos in the town of Estremoz (southern Portugal). Experimental work was undertaken to identify pigments and to elicit hypothesis about their local origin. Another aim was to ascertain the painting technique (binders, stratigraphy) and to try to investigate the causes that led to the deterioration of the blue a...
Characterization of Japanese color sticks by energy dispersive X-ray fluorescen...
Manso, M.; Valadas, S.; Pessanha, S.; Guilherme, A.; Queralt, I.; Candeias, A.E.; Carvalho, M.L.This work comprises the use of energy dispersive X-ray fluorescence (EDXRF), X-ray diffraction (XRD) and Fourier transformed infrared (FTIR) techniques for the study of the composition of twentieth century traditional Japanese color sticks. By using the combination of analytical techniques it was possible to obtain information on inorganic and organic pigments, binders and fillers present in the sticks. The col...
Yellow and red ochre pigments from southern Portugal: Elemental composition and...
Gil, M.; Carvalho, M.L.; Seruya, A.; Candeias, A.E.; Mirao, J.; Quiralt, I.Three different yellow and red ochre pigments geological sources from Alentejo—Terras rossas, schist units and weathered iron ore deposits—were studied by elemental and phase analysis complemented with Munsell and CIELAB colour parameters. Central aims were to underline the mineralogical and chemical distinctiveness of natural pigment sources and establish a connection between local geology and use of specific c...
Rediscovering Alentejo (South Portugal) earth pigments palette: provenance and ...
Gil, M.; Green, R.; Carvalho, M.L.; Seruya, A.; Queralt, I.; Candeias, A.E.; Mirao, J.Colored earth pigments sourced from Alentejo,Portugal, can be geologically categorized as either weathered carbonate rocks (terra rossas), schist units, or weathered iron ore deposits. The material was used until the mid 1900s by local residents as an ingredient in their tradi- tional lime wash paintings and possibly in the production of artistic murals across the Alentejo region since pre-historic times. An in...