Analysis of metallic archaeological artifacts by x-ray computed microtomography technique

Machado, Alessandra Silveira; Silva, Aline Saddock de Sá; Campos, Gemma; Gomes, Celso; Oliveira, Davi F.; Lopes, Ricardo Tadeu

doi:10.1016/j.apradiso.2019.06.016

Cited by 16 publications

(6 citation statements)

References 11 publications

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“…X-rays have been widely used in traditional internal investigations of cultural heritages and analyses of manufacturing techniques (Han et al, 2014;Lee et al, 2021;Song and Kim, 2021). More recently, radiographic imaging has been expanded to computed tomography technology, enabling multifaceted analyses (Hoffman et al, 2002;Machado et al, 2019;Park and Yang, 2020;Na and Hwang, 2021). Meanwhile, as γ-rays have shorter wavelengths and stronger penetrating power than X-rays, they can non-destructively probe artifacts that cannot be penetrated by X-rays (Han et al, 2012;Lee et al, 2013;Yi et al, 2013).…”

Section: γ-Ray Radiography and Image Analysismentioning

confidence: 99%

Convergence Modeling and Reproduction of a Bigyeokjincheolloe (Bomb Shell) Based on Three-dimensional Scanning and γ-ray Radiography

Kim

Huh

et al. 2022

J. Conserv. Sci

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The Bigyeokjincheolloe (bomb shell), a scientific cultural heritage, has outstanding historical value for sustaining a gunpowder weapon of Joseon. In this study, the bomb shell was modeled through three-dimensional (3D) scanning centered on the external shape and γ-ray radiography-based on the internal shape. In particular, to improve the contrast in the radiographic image, optimization and image processing were performed. After these processes, the thickness of the inner wall (2.5 cm on average) and the positions of the three mold chaplets were clearly revealed. For exhibition purposes, the 3D model of the bomb shell was output to a 3D printer and the output was rendered realistic by coloring. In addition, the internal functional elements, such as Mokgok, fuse, mud, gunpowder, and caltrops, were reproduced through handwork. The results will contribute to the study of digital heritages in two ways. First, the internal and external shapes of the bomb shell were modeled by fusing two different technologies, namely, 3D scanning and γ-ray radiography. Second, the internal shape of the bomb shell was constructed from the original form data and the reproduction was utilized for museum exhibitions. The developed modeling approach will greatly expand the scope of museum exhibitions, from those centered on historical content to those centered on scientific content.

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Section: γ-Ray Radiography and Image Analysismentioning

confidence: 99%

Convergence Modeling and Reproduction of a Bigyeokjincheolloe (Bomb Shell) Based on Three-dimensional Scanning and γ-ray Radiography

Kim

Huh

et al. 2022

J. Conserv. Sci

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“…Microtomografia cu raze X (microCT) este o tehnică de analiză neinvazivă și rapidă, utilizată în vederea identificării structurilor și texturii artefactelor arheologice metalice aflate sub incrustații. Prin utilizarea acestei tehnici a fost posibilă evaluarea structurii artefactelor, precum și cuantificarea pierderii de material, cauzată de coroziune 33 .…”

Section: Metode șI Tehnici De Analiză a Artefactelor Arheologiceunclassified

Aspecte privind măsurile de conservare preventivă aplicate artefactelor arheologice

Ardelean¹

2022

Materialele Conferinței Științifice Internaționale «Cercetarea Și Valorificarea Patrimoniului Arheologic Medieval»

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Archaeological heritage is social property which contributes to strengthening cultural identity; therefore, the objects, and the knowledge derived from them must be somehow returned to society. Preventive conservation must be applied in all stages the archaeological materials go through: excavation, moving or shipping, laboratory, storage and exhibition. On-site preventive conservation will help to ensure the long-term preservation of finds and information about their manufacture and use. The sudden change in the environment on excavation can cause rapid deterioration of an artefact if not stored in a suitable environment. The objective of a conservator is to minimize the post-excavation impact suffered by objects when they are removed from the ground and to take a series of preventive measures to delay the physical and environmental effects which lead to their deterioration, which are based on the control of the differences between outside and inside ground parameters. Before the excavation, the environment must be assessed, both above and below ground. The soil must be evaluated as to pH, salinity and physical structure. Working in wet contexts is different from working in dry, cold or warm ones. Organic materials are more vulnerable to deterioration factors. If wet organic materials are allowed to dry in an uncontrolled way, there will often be irreversible shrinking, distortion, cracking or collapse. Freshly excavated wet organic materials are vulnerable to biological attacks, particularly mould, due to increased temperatures, oxygen and light. Large or fragile objects will be vulnerable to breakage if they are excavated and handled without being supported. When objects are made up of more than one raw material, preventive measures must protect the material that is most sensitive to deterioration factors.

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“…In the present investigation, results are reported on three earrings from the Royal Tombs of Sipán, of which the cylindrical gold supports were studied using computed microtomography. MicroCT is a nondestructive method which importance is growing in the archaeological area for the structural analysis of artifacts (Bozzini et al ., 2014; Agostino et al ., 2016; Azeredo et al ., 2019; Machado et al ., 2019).…”

Section: Introductionmentioning

confidence: 99%

X-ray computed microtomography for the structural analysis of jewelry from the Museum “Royal Tombs of Sipán”

et al. 2020

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Precious ornaments from the Museum Royal Tombs of Sipán were analyzed by X-ray computed microtomography (microCT). The ornaments analyzed were golden earrings produced by the Moche culture that flourished along the north coast of present-day Peru between approximately 100 and 600 AD. Sipán, also known as Huava Rajada, is a mochica archaeological complex in the north of Peru. In particular, the spectacular jewelry, mainly composed of gold, silver, and copper alloys, gilded copper, and tumbaga, from the Museum “Royal Tombs of Sipán,” in Lambayeque, north of Peru, are some of the most sophisticated metalworking ever produced of pre-Columbian America. A portable microCT system consisting of a high-resolution flat panel detector and a mini X-ray tube were used for the structural analysis of these ornaments. The microCT images show parts of the internal structure, highlighting the manufacturing technique and gold sheets joining techniques of the Moche artisans. Furthermore, the advantage of using the portable microCT system for nondestructive testing is clear when the sample cannot be taken to the laboratory.

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Analysis of metallic archaeological artifacts by x-ray computed microtomography technique

Cited by 16 publications

References 11 publications

Convergence Modeling and Reproduction of a Bigyeokjincheolloe (Bomb Shell) Based on Three-dimensional Scanning and γ-ray Radiography

Convergence Modeling and Reproduction of a Bigyeokjincheolloe (Bomb Shell) Based on Three-dimensional Scanning and γ-ray Radiography

Aspecte privind măsurile de conservare preventivă aplicate artefactelor arheologice

X-ray computed microtomography for the structural analysis of jewelry from the Museum “Royal Tombs of Sipán”

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