Thermosetting composites based on bronze particles for archaeological and artistic metal heritage cloning
peer-reviewed Artificial Metals are polymeric semi-metallic composites obtained by combining thermosetting resins with atomized metal powders in order to achieve composite materials capable of reproducing metals, even in a rusty or corroded condition. These composites provide a solution for the reproduction of archaeological artefacts, sculptures, and ornaments for the purpose of conservation. This work explores mechanical properties of three different resins bronze composites loaded with two different proportions of metal filler. The degree of conversion of the samples was measured by differential scanning calorimetry (DSC) and flexural tests were carried out to determine their mechanical …
Reproducciones museísticas de piezas arqueológicas metálicas: de las técnicas de fundición a la utilización de metales artificiales
Las reproducciones de piezas arqueológicas cumplen una necesaria función en nuestras sociedades en tanto permiten una multiplicidad inducida del original, que redunda en beneficios para la conservación, divulgación y promoción de nuestro patrimonio. La reproducción de objetos metálicos ha supuesto un desafío para las instituciones museísticas, dada la complejidad de emular metales, y así se ha propuesto en muchos casos la implementación de técnicas tradicionales como la fundición a la cera perdida o los procesos electrolíticos, limitando la investigación en otros materiales El presente artículo propone una solución alternativa, fundamentada en el uso de composites de resinas termoestables c…
Identification of lead pigments in nanosamples from ancient paintings and polychromed sculptures using voltammetry of nanoparticles/atomic force microscopy.
Voltammetry of nanoparticles coupled with atomic force microscopy was used to identify lead pigments in nanosamples proceeding from works of art. Upon mechanical attachment of few nanograms of sample to a graphite plate, well-defined voltammetric responses were obtained for lead orange, lead yellow, lead white, litharge, minium, Naples yellow, and tin-lead yellow, allowing for an unambiguous identification of such pigments. Atomic force images provide evidence for the occurrence of pigment-characteristic reduction processes accompanied by metal deposition on the graphite substrate. Electrochemical parameters are used for pigment identification. Application to the method for identifying lead…