Potters and pigments: preliminary technological assessment of pigment recipes of American majolica by synchrotron radiation micro-X-ray diffraction (Sr-μXRD) |
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| Authors: | Javier G Iñañez Marisol Madrid-Fernández Judit Molera Robert J Speakman Trinitat Pradell |
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| Institution: | 1. Grupo de Investigación en Patrimonio Construido (GPAC), Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Centro de Investigación y Estudios Avanzados, Miguel de Unamuno 3, 01006 Vitoria-Gasteiz, Spain;2. IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain;3. Cultura Material i Arqueometria UB (ARQ|UB, GRACPE), Dept. de Prehistòria, Història Antiga i Arqueologia, Universitat de Barcelona, Montalegre 6, 08001 Barcelona, Catalonia, Spain;4. GRTD, Escola Politècnica Superior, Universitat de Vic, C. de la Laura 13, 08500 Vic, Catalonia, Spain;5. Museum Conservation Institute, Smithsonian Institution, 4210 Silver Hill Road, Suitland, MD 20746-2863, USA;6. Center for Applied Isotope Studies, University of Georgia, Athens, GA 30602, USA;7. Grup de Caracterització de Materials (GCM), Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Avda. del Canal Olímpic, s/n 08860, Castelldefels, Catalonia, Spain |
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| Abstract: | This paper assesses the impact of European ceramics on preexisting American potting technologies. Specifically we investigate the technological features of pigments used for production of colonial American majolica. In order to achieve this goal, majolica sherds from Puebla (4), and Oaxaca (2), both in Mexico, from Antigua (Guatemala) (2), from Panama (1), and from Mission San Luis (Florida) (5) were analyzed by synchrotron micro-X-ray diffraction (μ-XRD). Eleven out of these fourteen samples were also analyzed by scanning electron microscopy (SEM). The combination of micro-chemical and micro-structural techniques provides a cross sectional profile of the constituent minerals present ultimately providing information about the nature and distribution of the pigments used in their decorations, their dissolution in the glassy matrix, and the formation of crystalline compounds. Our results reveal significant differences among productions. |
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