EDXRF analysis of blue pigments used in Valencian ceramics from the 14th century to modern times

Roldán, C.; Coll, Jaume; Ferrero, J.L.

doi:10.1016/j.culher.2006.02.003

Cited by 49 publications

(32 citation statements)

References 3 publications

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“…This result is in agreement with recent studies showing a CoeCueNi correlation in 14th to 16th century Spanish and Italian glazed ceramics (Roldán et al, 2006;Zucchiatti et al, 2006). The major source of cobalt in 16th century Europe was the mining district of Erzgebirge (Saxony), in Germany.…”

Section: Colour Composition Of Glazessupporting

confidence: 82%

“…The production of the tiles from Santa Clara-a-Velha fits this time period, and therefore, the region of Erzgebirge could be a possible source of cobalt. But other sources must be considered, as the mines of Teruel, in Spain, a well-documented site of cobalt production, although those were of limited size (Roldán et al, 2006). Unfortunately there is lack of well-documented sources of cobalt production up to the 16th century (Soulier et al, 2002).…”

Section: Colour Composition Of Glazesmentioning

confidence: 99%

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Hispano-Moresque ceramic tiles from the Monastery of Santa Clara-a-Velha (Coimbra, Portugal)

Coentro

Trindade

Mirão³

et al. 2014

Journal of Archaeological Science

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a b s t r a c tA group of late 15theearly 16th century Hispano-Moresque glazed tiles from the Monastery of Santa Clara-a-Velha, in Coimbra, were, for the first time, characterised chemically and morphologically. Since the prevailing idea among art historians in Portugal is to judge the Hispano-Moresque tile heritage as Spanish production, the findings concerning technological processes were compared with the Islamic technology in the Iberian Peninsula and latter Hispano-Moresque in Spain. This study is the first analytical indicator of a production technology with some differences from the Hispano-Moresque workshops (such as Seville, Toledo, etc.) and points out to a possible local production. Five different coloured glazes were identified: white, blue, green, amber and black, all displaying high-lead content, as expected for this type of ceramics. Tin oxide was identified in high contents (7e14 wt.%) in white and blue glazes, its crystals homogenously distributed in also very homogeneous glazes, showing similarities with an Islamic glazing technology. On the other hand, Ca-rich thick glazeeceramic interfaces were observed, with many mineral inclusions (wollastonite (CaSiO 3 ) and also K-feldspars (general formula KAlSi 3 O 8 ), showing a higher resemblance with a later Hispano-Moresque technology. Other compounds were also identified from reactions involving the colour compound: malayaite (CaSnOSiO 4

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Section: Colour Composition Of Glazessupporting

confidence: 82%

Section: Colour Composition Of Glazesmentioning

confidence: 99%

Hispano-Moresque ceramic tiles from the Monastery of Santa Clara-a-Velha (Coimbra, Portugal)

Coentro

Trindade

Mirão³

et al. 2014

Journal of Archaeological Science

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“…A cor azul é obtida pelo uso de óxido de cobalto, cujo minério utilizado como matéria-prima tem a particularidade de conter diferentes combinações de elementos químicos que podem ser relevantes para obter informação sobre a proveniência e datação [34][35][36][37]. Na colecção de azulejos TRL, os vidrados azuis apresentam diferentes combinações de elementos associados ao cobalto, maioritariamente CoFe-Ni-Cu.…”

Section: Cor Azulunclassified

“…A combinação observada nos vidrados azuis de SCV é Co-Fe-Ni-Cu [21], similar à generalidade da colecção TRL. Este resultado está de acordo com estudos recentes em vidrados cerâmicos de Espanha e Itália, dos séculos XIV e XVI [34]. Na colecção de azulejos de SAC, a combinação encontrada em dois exemplares azuis é Co-Fe-Ni-As [21].…”

Section: Cor Azulunclassified

“…Os valores encontrados estão também de acordo com os teores de SnO 2 observados em cerâmicas islâmicas e hispano-mouriscas das regiões de Múrcia e Paterna (Espanha) [32][33]. Outros autores estabelecem uma comparação entre vários centros de produção de Espanha, com peças de vidrado estanífero opaco do século X ao século XIV, cuja composição em SnO 2 varia entre 5 e 15 %, consoante a época e região [34].…”

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Chemical, physical and mineralogical characterisation of the Hispano- Moresque tile collection from Lisbon Roman Theatre Museum

et al. 2017

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Palavras-chaveAzulejos hispano-mouriscos Vidrados plúmbicos Corpo cerâmico Composição química Características físicas Escavação arqueológica ResumoNeste trabalho estuda-se um conjunto de fragmentos de azulejos hispano-mouriscos do espólio do Museu de Lisboa -Teatro Romano. Apresenta-se a caracterização química e morfológica dos vidrados e do corpo cerâmico e a caracterização mineralógica deste último. Os vidrados são plúmbicos, sendo que os de cor branca e azul devem a sua opacidade a SnO 2 (4-11 %). As restantes cores apresentam teores de SnO 2 inferiores a 2 %. O corpo cerâmico é típico de pastas calcíticas, sendo os teores de CaO de 16-28 % e de Fe 2 O 3 de 4-5 %, este último responsável pela cor creme/ rosada. O estudo mineralógico permitiu identificar volastonite, calcite, diópsido e plagioclases cálcicas. Os resultados indicam que as temperaturas de cozedura foram geralmente próximas de 1000 ºC enquanto em alguns casos terão provavelmente estado mais perto dos 900 ºC. A caracterização física revelou valores de 30-42 % para a porosidade aberta, distribuição de tamanho de poros bimodal, absorção máxima de água de 16-26 % e coeficientes de absorção de água por capilaridade de 1,5-6,1 kg·m AbstractThis work intends to study a set of Hispano-Moresque tile fragments from the Lisbon Roman Theatre Museum collection. The chemical and morphological characterization of the glazes and the ceramic body was presented and also the mineralogical characterization of the latter. The glazes are plumbic, being the opacity of the white and blue colors due to SnO 2 (4-11 %). The other colors present amounts of SnO 2 lower than 2 %. The ceramic body is typical of calcite-based pastes with CaO between 16-28 % and Fe 2 O 3 between 4-5 %, the latter being responsible for the cream/ rose color. The mineralogical study identified wollastonite, calcite, diopside and calcic plagioclases. The results indicate that the firing temperature was generally around 1000 ºC while in some cases it was probably closer to 900 ºC. Physical characterization revealed values of 30-42 % for open porosity, a bimodal pore size distribution, a maximum water absorption of 16-26 % and a water absorption coefficient by capillarity of 1,5-6,1 kg·m

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Della Robbia blue glaze: micro‐Raman temperature study and X‐ray fluorescence spectroscopy characterization

Sendova

Kaiser

Scalera

et al. 2009

J Raman Spectroscopy

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Micro-Raman temperature study and X-ray fluorescence (XRF) spectroscopy were used for characterization of the blue glaze on Saint Johnthe Baptist -majolica terracotta relief attributed to Andrea Della Robbia and Saint Johnthe Baptist withCross -majolica terracotta statue attributed to Giovanni Della Robbia. Both objects are on permanent exhibition in the John and Mable Ringling Museum of Art in Sarasota, FL. This study proves that the detection of the 548 cm −1 Raman band alone cannot serve as evidence for presence of lazurite crystallites in the pigment in the glaze. It was established that the famous Della Robbia blue is due to the combined effect of Co-Ni-Cu-Zn atoms and S 3 − ions embedded in a lead silicate matrix. It is proposed that the Della Robbia family used Co-containing sulfide ores as a source for manufacturing their blue pigments.

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EDXRF analysis of blue pigments used in Valencian ceramics from the 14th century to modern times

Cited by 49 publications

References 3 publications

Hispano-Moresque ceramic tiles from the Monastery of Santa Clara-a-Velha (Coimbra, Portugal)

Hispano-Moresque ceramic tiles from the Monastery of Santa Clara-a-Velha (Coimbra, Portugal)

Chemical, physical and mineralogical characterisation of the Hispano- Moresque tile collection from Lisbon Roman Theatre Museum

Della Robbia blue glaze: micro‐Raman temperature study and X‐ray fluorescence spectroscopy characterization

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