An insight into the firing conditions of Chinese blue-and-white porcelain through XANES

Veiga, João Pedro; Ruivo, Andreia; Pena, T.; Salas‐Colera, Eduardo; Scardina, Silvia Bottura; Lima, Augusta; Figueiredo, Elin; Cotte, Marine; Lima, M.T.Costa

doi:10.1039/d2ja00006g

Cited by 3 publications

(2 citation statements)

References 44 publications

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“…Hyperspectral imaging (HSI) or Vis-NIR reflectance spectroscopy is a non-invasive technique that has been applied to investigate colourants on stained glass and ceramics [26][27]. With this goal, a Specim IQ mobile hyperspectral camera by Specim Ltd (Oulu, Finland) was used to acquire hypercubes of the raw materials (before and after firing) and azulejos from the Decormel Catalogue.…”

Section: Hyperspectral Imaging Camera (His)mentioning

confidence: 99%

Colours of the Tijomel ceramic manufacture (1941-1992): characterisation of a set of ceramic colourants and glazed tiles from Decormel Materials Catalogue

Coutinho,

Pereira,

Ruivo

et al. 2024

Cons. Património

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Tijomel was considered one of the most modern ceramic manufacturers in the Iberian Peninsula in the mid-20th century. Located at Caxarias (Ourém, Portugal), this manufacturer produced diverse ceramic-based architectural materials, from common clay bricks to sophisticated modernist azulejos. Recently members of the family of the former Tijomel Manufacture owners retrieved a collection of 33 raw materials, mostly ceramic colourants. In this study, the chemical characterisation of these ceramic colourants was performed and compared with an azulejos commercial catalogue of the same manufacturer entitled Decormel Catalogue. The recovered raw materials and azulejos were investigated using a multi-analytical approach comprising h-EDXRF and μ-XRD to obtain their elemental and mineralogical composition and HSI and colourimetry to analyse their optical properties. Results provided a glimpse of the wide variety of ceramic colourants used in mid-20th century and showed that Tijomel combined the use of traditional azulejo colourants with more recent compositions.

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Section: Hyperspectral Imaging Camera (His)mentioning

confidence: 99%

Colours of the Tijomel ceramic manufacture (1941-1992): characterisation of a set of ceramic colourants and glazed tiles from Decormel Materials Catalogue

Coutinho,

Pereira,

Ruivo

et al. 2024

Cons. Património

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“…The increase of lightness was observed for Azul Valverde, causing a more severe bleaching effect when compared to Atlantic Blue limestone. In fact, colourimetry has been applied to study different materials, from the microelectronic field [53], to the Chinese blue-and-white archaeological porcelain [54], or even to the medieval tiles [55]. Furthermore, some authors have proposed a system for monitoring environmental conditions in museums based on the measurement of colour changes by image processing [56].…”

Section: Colour Fadingmentioning

confidence: 99%

Contribution to the Understanding of the Colour Change in Bluish-Grey Limestones

et al. 2022

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Bluish-grey limestones have been extensively used as ornamental stones for decoration purposes in buildings, as well as in works of art, and accordingly, have been the target of intense exploration. In Portugal, the Jurassic limestone massif known as the Maciço Calcário Estremenho (MCE), has been the source of grey-coloured ornamental stones, namely the Azul Valverde (one of the most well-known bluish-grey limestones) and Atlantic Blue varieties, both of which may undergo colour changes in outdoor environments. In this sense, it is important to understand the sudden colour change from bluish-grey to yellow/beige in the same limestone block in a quarry, or even, what happens to the colour when polished limestone is placed outdoors. This study was undertaken using various techniques, namely XRF (X-ray fluorescence spectrometry), XRD (X-ray diffraction), SEM (scanning electron microscopy), DTA–TG (differential thermal analysis/thermogravimetry) and colourimetry. Synchrotron radiation was also used at the European Synchrotron Radiation Facility (ESRF, Grenoble, France) where XANES (X-ray Absorption Near Edge Structure) spectra at Fe K-edge were collected to ascertain the speciation state of Fe in different coloured zones of the limestone, previously checked by EDXRF (energy dispersive X-ray fluorescence). The presence of Fe2+ and Fe3+ are responsible for the greyish and yellow/brown colour, respectively. On the other hand, the UV radiation from the sun causes a quickened and severe bleaching/fading on the dark blue/grey polished limestone.

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Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

Carter¹,

Clough

Fisher

et al. 2022

J. Anal. At. Spectrom.

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An insight into the firing conditions of Chinese blue-and-white porcelain through XANES

Abstract: Co K-edge XANES was used to evaluate the firing atmosphere conditions in the production of blue-and-white porcelain.

Cited by 3 publications

References 44 publications

Colours of the Tijomel ceramic manufacture (1941-1992): characterisation of a set of ceramic colourants and glazed tiles from Decormel Materials Catalogue

Colours of the Tijomel ceramic manufacture (1941-1992): characterisation of a set of ceramic colourants and glazed tiles from Decormel Materials Catalogue

Contribution to the Understanding of the Colour Change in Bluish-Grey Limestones

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

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