La Espiral Cave (Cuba): Guano and signs of Plant Substances Used as Paint Ingredients |
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| Authors: | Racso Fernández Dany Morales Martí Mas Alberto Jorge Monica Solís Enrique Parra Dialvys Rodríguez |
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| Affiliation: | 1.Cuban Group of Rock Art Researchers,Cuban Institute of Anthropology (ICAN),Havana,Cuba;2.Prehistory and Archaeology Department,Distance Learning National University (UNED),Madrid,Spain;3.National Museum of Natural Sciences,Superior Council of Scientific Research State Agency (CSIC),Madrid,Spain;4.Materials Laboratory,Institute of Spain Cultural Heritage,Madrid,Spain |
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| Abstract: | 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. |
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