Examinando por Autor "Jorge, Alberto"

Mostrando 1 - 2 de 2
  • Miniatura
    Publicación
    La Espiral Cave (Cuba): Guano and signs of Plant Substances Used as Paint Ingredients
    (Springer Nature, 2017-05-22) Fernández, Racso; Morales, Dany; Mas Cornellá, Martí; Jorge, Alberto; Solís Delgado, Mónica; Parra, Enrique; Rodríguez, Dialvys
    At La Espiral cave, located in Bahia Honda municipality (Artemisa province, Cuba), there are several pictographs, including two of particular importance due to the design used: one of concentric circles and another of a spiral. We analyzed the pigments and binders used in one of these pictographs. The chemical ingredients of the paint are considered in this article, as well as the use of bat guano as a major pigment compound. The apparent presence of ellagic acid, ellagitannin, or anthocyanins would strengthen the hypothesis that artists used vegetable protein as a paint binder or solvent.
  • Miniatura
    Publicación
    Minateda rock shelters (Albacete) and post-palaeolithic art of the Mediterranean Basin in Spain: Pigments, surfaces and patinas
    (Elsevier, 2013-12) Mas Cornellá, Martí; Jorge, Alberto; Gavilán, Beatriz; Solís Delgado, Mónica; Parra, Enrique; Pérez, Pedro Pablo
    The inorganic and organic fractions of two microsamples of prehistoric paint from the same site, the Minateda rock shelters, are analysed here for the first time. The two samples correspond to two rock shelters of different styles (Levantine and schematic) e Abrigo Grande de Minateda (The Great Rock Shelter of Minateda) and Abrigo del Barranco de la Mortaja (Del Barranco de la Mortaja Rock Shelter). Since its discovery, historiographical tradition has emphasised the Abrigo Grande de Minateda, with its magnificence and complexity, as emblematic of the origin and evolution of rock art in the Mediterranean Basin of the Iberian Peninsula (a UNESCO World Heritage Site). Four complementary techniques eMicrophotography, Scanning Electron Microscopy-Energy Dispersive X-Ray Spectroscopy (SEM-EDX), Raman Spectroscopy and Gas ChromatographyeMass Spectroscopy (GCeMS)e were combined to identify and characterise the physicochemical properties of the paint and of the surface. We present an interpretation of the results that leads us to define complex taphonomic alterations beyond the usual distinction of layers that include the surface, pigments and patinas.