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    Radiocarbon dating of asian lacquers molecular characterization and assessment of a pretreatment method prior to accelerator mass spectrometry

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    Authors
    Wojcieszak, Marine
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    Discipline
    Chemical sciences
    Subject
    Asian lacquer, micro-Raman spectroscopy, radiocarbon dating, THM-Py-GC-MS
    Audience
    Scientific
    Date
    2023
    Publisher
    Radiocarbon
    Metadata
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    Description
    Lacquerwork technologies comprise multiple techniques depending on countries, time, and traditions. Carved Asian lacquers applied on wooden objects consist of multiple thin uncolored or pigmented layers spread over the surface. To radiocarbon (14C) date these types of objects, often only the wooden structure is used. Here we report on a set of carved lacquered objects that were dated based on stylistic form, 14C dating of the wooden structure and of the Asian lacquers. THM-Py-GC-MS and micro-Raman spectroscopy were used to confirm the molecular composition of the lacquers and helped assessing the pretreatment protocol. The lacquers analyzed contained between 20 and 50% wt carbon, thus 2–5 mg of sample were necessary for 14C dating. The dates obtained on wood and lacquers showed a reliable correlation. The results suggest that, in most cases, it is sufficient to sample a part of the lacquer layers to date an object. We advise to perform an acid pretreatment followed by a successive solvent immersion with an increasing polarity. Dating different components of a lacquered object can also help to understand previous restoration interventions that frequently occur for ancient lacquered objects. Ceramic, metallic, and other objects covered with Asian lacquers can also be dated using this approach.
    Citation
    Wojcieszak M, Veenhoven J, Van den Brande T, Saverwyns S, Lynen F, Boudin M., “Radiocarbon dating of asian lacquers molecular characterization and assessment of a pretreatment method prior to accelerator mass spectrometry” , Radiocarbon, 65/5 (2023) :1193-1212
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/14709
    publisherlink: https://www.cambridge.org/core/journals/radiocarbon/article/abs/radiocarbon-dating-of-asian-lacquers-molecular-characterization-and-assessment-of-a-pretreatment-method-prior-to-accelerator-mass-spectrometry/39999F490D9E59DE2CB4527FE6DDA218
    doi: http://dx.doi.org/doi:10.1017/RDC.2023.90
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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