Estudio colorimétrico de los azulejos del Patio de las Doncellas del Real Alcázar de Sevilla (España)*

Melgosa, Manuel; Montero, Francisco José Collado; Fernández, Esteban Julián; Medina, Victor

doi:10.1016/j.bsecv.2015.03.002

Cited by 8 publications

(4 citation statements)

References 14 publications

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“…The CIELAB color‐difference formula is useful and commonly employed in the cultural heritage research field 52–57 . However, in this case, CIEDE2000 color‐difference formula was chosen as a standard following the latest recommendation made by CIE and ISO 49,58,59 .…”

Section: Materials and Methodologymentioning

confidence: 99%

“…51 The CIELAB color-difference formula is useful and commonly employed in the cultural heritage research field. [52][53][54][55][56][57] However, in this case, CIEDE2000 colordifference formula was chosen as a standard following the latest recommendation made by CIE and ISO. 49,58,59 In fact, CIEDE2000 was initially recommended for a set of "reference conditions" (e.g., uniform samples with CIELAB color differences below 5.0 units) that are different from the current ones.…”

Section: Methodsmentioning

confidence: 99%

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Colorimetric evaluation of 3D printing polymers exposed to accelerated aging for Cultural Heritage applications

Higueras

Montero

Medina

2023

Color Research & Application

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3D printing has become a widespread technology that allows the creation of physical objects from different materials. The conservation and restoration of Cultural Heritage field has recently introduced this technology as a complement to its traditional methods. However, the main concern in the application of 3D printing in this context is the long‐term behavior of the materials used. The key objective of this research was the identification of the suitability of 3D printing filaments for conservation purposes. The methodology followed in this study consisted of a selection of 13 3D printing filaments for Fused Deposition Modeling (FDM) technologies, which were tested and exposed to an accelerated aging procedure. In order to classify and recommend the materials that present better results, the properties of color, the glossiness, the pH and the Volatile Organic Compounds emission were investigated. This paper collects the results of the analyses carried out, focusing discussion on the colorimetric behavior. The results demonstrate the usefulness of some of the materials studied, highlighting the performance of EP as one of the most stable and reliable materials while Flex is one of the most changeable ones in the Cultural Heritage context. Even though this research provides an overview of the aging of the materials studied, further analyses should be performed to understand the chemical composition and its behavior when exposed to a long‐lasting aging process.

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Section: Materials and Methodologymentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Colorimetric evaluation of 3D printing polymers exposed to accelerated aging for Cultural Heritage applications

Higueras

Montero

Medina

2023

Color Research & Application

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“…In the same way, no chemical analyses on the panel of tiles are available. However, we made colorimetric and chemical analyses on tilework from the Courtyard of the Maidens of the Real Alcázar of Seville [23][24][25], whose tiles were also made by Nasrid crafters, much like the Alhambra ones. The referred analyses by scanning electron microscopy-energy dispersive X-ray (SEM-EDX) confirm the presence of lead-based glazes with different metal elements that make oxides.…”

Section: Sensors 2019 19 X For Peer Review 3 Of 13mentioning

confidence: 99%

Spectral Image Processing for Museum Lighting Using CIE LED Illuminants

Martínez-Domingo

Melgosa

Okajima

et al. 2019

Sensors

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This work presents a spectral color-imaging procedure for the detailed colorimetric study of real artworks under arbitrary illuminants. The results demonstrate this approach to be a powerful tool for art and heritage professionals when deciding which illumination to use in museums, or which conservation or restoration techniques best maintain the color appearance of the original piece under any illuminant. Spectral imaging technology overcomes the limitations of common area-based point-measurement devices such as spectrophotometers, allowing a local study either pixelwise or by selected areas. To our knowledge, this is the first study available that uses the proposed CIE (Commission Internationale de l’Éclairage) light-emitting diode (LED) illuminants in the context of art and heritage science, comparing them with the three main CIE illuminants A, D50, and D65. For this, the corresponding colors under D65 have been calculated using a chromatic adaptation transform analogous to the one in CIECAM02. For the sample studied, the CIE LED illuminants with the lowest average CIEDE2000 color differences from the standard CIE illuminants are LED-V1 for A and LED-V2 for D50 and D65, with 1.23, 1.07, and 1.57 units, respectively. The work studied is a Moorish epigraphic frieze of plasterwork with a tiled skirting from the Nasrid period (12th–15th centuries) exhibited in the Museum of the Alhambra (Granada, Spain).

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“…There are recent studies which have already applied the study of colorimetry in the field of monumental heritage, analyzing the performances of treated pigments [ 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 ]. For this reason, the use of pigments in different applications within the field of materials engineering and interventions in architectural heritage is necessary in order to achieve matching visual and aesthetic characteristics [ 57 , 58 ].…”

Section: Introductionmentioning

confidence: 99%

Study and Characterization of Special Gypsum-Based Pastes for Their Use as a Replacement Material in Architectural Restoration and Construction

et al. 2022

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Within the construction sector, the use of gypsum-based pastes features in the majority of monuments, giving this material significant relevance in conservation and restoration projects affecting the world’s cultural heritage. In this research, we evaluated special gypsum-based colored pastes mixed with air lime, hydraulic lime and sodium silicate, and eight different pigments for their use as replacement materials in architectural restoration and construction. We analyzed the suitability of their physical and chemical properties and their hydric characteristics, mechanics and colorimetric implications in two different studies after 28 days and 120 days. The characterization of the products has mainly confirmed the suitability of the pastes containing pigments for use in the most common applications for these kinds of mixes, highlighting that their specific capacities are worth leveraging. The crystallization of gypsum minerals, observed in all of the mixes, helps to consolidate the shrinkage cracks which appear inside the pastes, improving their mechanical strength values. Another observation of the pastes is related to the amorphous silica precipitates in the mixes which contained sodium silicate: the latter provided to them good mechanical behavior. The improvement observed in the pastes containing the green earth pigment is substantial, due to the inclusion of aluminum silicates and Mg, which is partly responsible for the increased compressive strength of the pastes. Finally, the colorimetric analysis is of vital importance in determining the loss of intensity of the colors of the pastes used, since subjective observation leads to serious errors of interpretation.

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Estudio colorimétrico de los azulejos del Patio de las Doncellas del Real Alcázar de Sevilla (España)*

Cited by 8 publications

References 14 publications

Colorimetric evaluation of 3D printing polymers exposed to accelerated aging for Cultural Heritage applications

Colorimetric evaluation of 3D printing polymers exposed to accelerated aging for Cultural Heritage applications

Spectral Image Processing for Museum Lighting Using CIE LED Illuminants

Study and Characterization of Special Gypsum-Based Pastes for Their Use as a Replacement Material in Architectural Restoration and Construction

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