José Luis Ruvalcaba-Sil's research while affiliated with Universidad Nacional Autónoma de México and other places

Publications (11)

Article
According to historical sources, yellow colorants have been used since ancient times; despite this, their identification in textiles, Mesoamerican codices and other colonial documents is still a difficult task to perform. Most of the analytical techniques traditionally employed in the identification of yellow dyes, like HPLC-mass spectrometry, requ...
Conference Paper
Full-text available
En el ámbito de la construcción de tierra, se tienen como antecedentes estructuras y conjuntos de gran antigüedad, que forman parte del patrimonio cultural; también se encuentra todos ls tipos vernáculas, para la edificación de viviendas con materiales tradicionales y disponibles en el contexto local. Hoy en día se tiene por correcta la apreciación...
Article
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Purísima Concepción, a large-format and unusual panel painting attributed to the 18th century, based on style and the common aspect of the visual tradition of the Virgin Mary found in the Viceroyalty of New Spain, is sheltered at the Museo Ex-convento San Agustín Acolman-INAH, Mexico, an institution opened in late 1920, and one of the oldest museum...
Article
Full-text available
This work concerns the study of colors and dyes identified on archaeological textiles from the Atacama Desert. The different garments and ornaments come from the excavation of two important pre-Columbian cemeteries of the Tarapacá region: Tarapacá-40 attributed to the Formative period (1100 BC–660 AD) and Pica-8 to the Late Intermediate period (900...
Article
Full-text available
Adobe masonry is one of the oldest construction systems still in use today, Mexico has an enormous cultural heritage with traditional adobe houses being very representative of the rural communities and their culture. The 2017 Puebla Earthquake on September 19th struck the country causing the loss, destruction, and damage of historic buildings in se...
Article
Full-text available
Techinantitla building complex, in the Amanalco neighborhood of the ancient city of Teotihuacan, is famous for the iconography and quality of the mural paintings found in this site. A significant part of this heritage has been lost due to looting. In recent years, an interdisciplinary research project was developed to study the limited patrimony th...
Article
Full-text available
Almost three hundred Spanish colonial missions—or their remains—are scattered over the vast state of Chihuahua in northern Mexico. A few of them still display painted decorations on the wood ceilings and walls. The decorated areas vary greatly, from the whole ceiling of the main aisle to just a few square meters in a lateral chapel, and so does the...
Article
Restoration works for the cultural heritage in México have commonly used traditional materials, being the slake lime one of the main solutions employed. Nevertheless, other lime products have not been studied or applied in patrimonial works. The main objective of this research was to verify if high purity limes can be used as an alternative for res...
Article
In the restoration field and the cultural heritage, the treatment of colour is very important, being an important factor for the decisions and interventions in historic buildings. However, some of these have not the same recognition and protection by authorities, being really vulnerable, especially against natural phenomena like the earthquakes. Af...
Article
Full-text available
An interdisciplinary and multi-institutional group of science and art conservation specialists has provided new insight into the painting materials used in the polychrome walls and wooden ceilings in four seventeenth century Spanish colonial churches of Nueva Vizcaya (Chihuahua, Mexico). A multi-analytical study of the decorative surfaces was perfo...
Article
Full-text available
This research presents the recovery of three fragments of panel painting in the state of Tlaxcala, Mexico. At the end of the twentieth century, these fragments were subject to a theoretical study, applying an interdisciplinary and inter-institutional methodology of historiographic and technical analysis in order to understand their meaning, techniq...

Citations

... However, this technique requires sampling, a procedure that is usually limited or even forbidden in these unique and invaluable objects and thus the use of non-destructive and non-invasive analyses is preferred. These types of analyses are becoming increasingly available in recent years, generally employing a combination of imaging techniques and portable spectrometers that allow performing a complete analysis while preserving the integrity of the studied object [13,14]. ...
... En paralelo al desarrollo de los pigmentos de origen mineral, el uso de tintes de origen orgánico aplicados sobre textiles se evidencia en Los Andes Centrales desde hace al menos 7.800 años atrás (Splistoser et al. 2016), para con el tiempo ampliar significativamente la paleta de colores disponible (Antunez de Mayolo 1989;Fester y Cruellas 1934;Phipps 2021;Roquero 2008, entre muchos). En el norte de Chile, aunque más reducida, la gama de colores visible desde el Formativo, hace alrededor de 3.500 años, demuestra no obstante el uso de una gran variedad de tintes para su obtención (Sepúlveda et al. 2021b), reemplazando la aplicación de pigmentos minerales rojo y negro sobre esteras vegetales tejidas durante el Arcaico (11.000 a 3.700 años a.p.). Si bien desconocemos cuándo se empezaron a seleccionar ciertas materias por su color para su uso, no es posible descartar que esto haya ocurrido desde el arcaico al emplear rocas de colores específicos para la talla y plumas o pieles para la confección de vestimentas. ...
... Clays are by definition mineral sediments constituted mainly by hydrous aluminium phyllosilicates with a fine and divided particle size. Additionally, clays have excellent binding properties, so they have been used historically as cementitious materials (Sanchez-Calvillo, et al., 2021). In Mexico, we can find different types of clays, and they have been used for construction purposes over time; particularly, in the State of Michoacan, we can find the presence of clays in construction components like adobes, ceramic bricks, union mortars and earthen refurbishments, among many others. ...
... In general, studies that investigate the types of materials and technology used in creating the ancient murals employ techniques such as Raman spectroscopy, Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy plus energy-dispersive X-ray spectroscopy (SEM-EDS), and X-ray diffractometry (XRD) to identify pigments and organic materials used in conservation treatments [14][15][16][17][18][19]. In particular, in recent years, nondestructive analytical methods based on portable X-ray fluorescence (P-XRF) spectrometry, particle-induced X-ray emission (PIXE), and false-color infrared imaging (FCIR), combining spectrophotometric colorimetry and spectral analysis, have been improved and applied to research on murals [13,[20][21][22][23][24][25][26][27][28][29][30]. These techniques are noninvasive and, therefore, allow us to obtain the composition of the main elements on the sample surfaces at several points, as well as create maps. ...
... Many studies have compared the physical, chemical, and mechanical properties of lime powder and lime putty based mortars. Recent studies [6,20] show that mortars with dry hydrated lime have a higher carbonation rate and higher compressive and flexural strength values compared to the lime putty mortars subjected to ageing for more than 90 days. On the contrary, older studies promote the use of lime putty based mortars. ...
... The use of scanning electron microscope (SEM) images coupled with EDS, a technique with widespread use in cultural heritage [61], allowed us to confirm the chemical composition of the mineralogical phases in those soils [62]. The microphotographs and EDS microanalyses were performed in a benchtop SEM Hitachi 3030+ to quantify their presence in soils under low vacuum using a 18 kV electron beam. ...
... However, this technique requires sampling, a procedure that is usually limited or even forbidden in these unique and invaluable objects and thus the use of non-destructive and non-invasive analyses is preferred. These types of analyses are becoming increasingly available in recent years, generally employing a combination of imaging techniques and portable spectrometers that allow performing a complete analysis while preserving the integrity of the studied object [13,14]. ...