Mineralogical characterization of pre-hispanic pottery at the Mesa de Los Santos region, Colombia

Mendoza, Karina Andrea Portilla; Pinzon-Nuñez, Diego Armando; González, Leonardo Moreno; Umaña, Ricardo Mier; Reyes, Carlos Alberto Ríos; Martínez, José Antonio Henao

doi:10.18273/revbol.v41n2-2019007

Cited by 4 publications

(1 citation statement)

References 33 publications

(39 reference statements)

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“…Biofilm removal with the different cleaning methods was investigated through its main bands, typical of proteins and esters (aliphatic C-H stretching at 2931 cm −1 , C=O stretching at 1710 cm −1 and amide II at 1558 cm −1 ). The band at 1668 cm −1 , which is also well visible in uncolonized earthenware, was attributed to the overlap of amide I vibration in proteins and to the -OH bending in Si-OH groups [31,45,46]; therefore, it was not considered for monitoring biofilm removal.…”

Section: Reflectance Ftir Spectroscopymentioning

confidence: 99%

Systematic testing, verification and validation of laser treatments for unglazed earthenware affected by lichens and fungi biodeterioration

Ciofini,

Mazzotti,

Rondelli

et al. 2024

J. Phys. Photonics

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In recent years, there has been a growing interest in exploring environmentally friendly and healthy alternatives to conventional solvent cleaning and biocides in the conservation of stone artworks. Here, we focus on the potential of laser-based photonic methods for treating biodeteriorated earthenware artefacts. The investigation was conducted on Roman dolia (jars) of the International Museum of Ceramics (MIC), Faenza, Italy. Three removal methods were tested and compared: i) brushing using a soft-bristled electric brush and water, referred to as brush cleaning; ii) a combination of brushing and laser ablation; and iii) biocide and brushing. Four laser systems with different wavelengths and optimized pulse durations in nanosecond or microsecond regimes were used in the tests. Systematic irradiation tests were conducted to determine the damage thresholds and define safe laser irradiation levels. The characterizations of the surfaces under treatment were carried out pre- and post-laser irradiation using optical microscopy, 3D photogrammetry, and Pulse-Amplitude-Modulated Chlorophyll-Fluorometry (CF-PAM). Furthermore, spectroscopic methods based on FTIR, Raman, and LIBS techniques were used to assess the effectiveness of the removal process and the composition of uncovered surfaces.Results have indicated that gentle brushing and water is the most effective approach for safely removing around 60% of the bio-colonization weakly anchored to the substrate over the area under treatment. This comprised viable species, whereas the remaining 40% of the area included endolithic species, mostly thalli of Verrucaria nigrescens and rock-dwelling fungi. The eradication of the latter was the real conservation concern requiring attention. Following the experimentation, the optimal method for safely uncovering the earthenware surface was a combination of water-assisted brushing and 1064 nm laser irradiation as a finishing treatment. 

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Section: Reflectance Ftir Spectroscopymentioning

confidence: 99%

Systematic testing, verification and validation of laser treatments for unglazed earthenware affected by lichens and fungi biodeterioration

Ciofini,

Mazzotti,

Rondelli

et al. 2024

J. Phys. Photonics

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Use of clays by-products from phosphate mines for the manufacture of sustainable lightweight aggregates

Bayoussef

Loutou

Taha

et al. 2021

Journal of Cleaner Production

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Surface treatment of red painted and slipped wares in the middle Yangtze River valley of Late Neolithic China: multi-analytical case analysis

et al. 2022

Herit Sci

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Red slipped and painted wares (RSW and RPW) were manufactured to cook, serve, or store foods and liquids in the middle Yangtze River valley (MYRV) of China some 8500 and 7800 years ago, respectively. Their primary use narrowed down to serving and drinking in the Upper Qujialing (5300–4500 cal BP) and Shijiahe (4500–4200 cal BP) periods when initial states (bang guo) took shape and developed in the region. The increasing social complexity in MYRV correlated with the formation of community and neighborhood identity through rituals and socio-economic ties involving the widespread use of RSW and RPW. How the two wares were produced and used helps us understand the relationships among productive activities, identity, and social inequality in MYRV. This paper presents the first overview of RSW and RPW in the Neolithic MRYV. It introduces a multi-analytical study of the two wares—mostly dating to the Shijiahe period—unearthed from the site of Fenghuangzui in Xianyang City of Hubei Province, China. Optical microscopic examination revealed that the paint of RPW—50 μm thick on average—was applied using a brush while the slip of RSW is thinner and finer and possibly formed by self-slipping. Handheld X-ray fluorescence (hhXRF) and benchtop micro-XRF analyses ascribed the red paint or slip to iron and iron oxide. Raman and X-ray absorption fine structure analyses confirmed that iron was present in the paint or slip in the form of hematite with a poorly developed crystalline structure. Furthermore, thin-section petrography implied that different pastes were used to produce RPW and RSW, and hhXRF data indicated that the Upper Qujialing and Shijiahe pottery differ in the concentrations of five elements (Zr, Fe, Mn, Ti, and Ba), which might be helpful in future provenance studies of RSW and RPW. Our study discloses the complexity of the manufacture of RSW and RPW at Fenghuangzui. More details of RSW and RPW production and use from our ongoing project shall reveal the role of the two wares in the social dynamics of the Late Neolithic MYRV. Graphic Abstract

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Mineralogical characterization of pre-hispanic pottery at the Mesa de Los Santos region, Colombia

Cited by 4 publications

References 33 publications

Systematic testing, verification and validation of laser treatments for unglazed earthenware affected by lichens and fungi biodeterioration

Systematic testing, verification and validation of laser treatments for unglazed earthenware affected by lichens and fungi biodeterioration

Use of clays by-products from phosphate mines for the manufacture of sustainable lightweight aggregates

Surface treatment of red painted and slipped wares in the middle Yangtze River valley of Late Neolithic China: multi-analytical case analysis

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