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<p>Numerous studies have reported using strawboard covers (SC) to preserve heritage artefacts. However, this solution has working limitations under the stimuli such as temperature, moisture, etc. Researchers used paraloid (P) B-72 to address this issue. But hitherto, little has been testified on the heritage artefacts monitoring using PB-72 concealment on SC. This study highlights the fabrication of a sensor for monitoring heritage artefacts based on the resonance frequency (R<sub>f</sub>) concept with a micro-strip patch antenna (MPA). In this study, a substrate of PB-72 was 3D-printed and used as concealment on the SC upon which an R<sub>f</sub>-based sensor was fabricated. For this study, a substrate of 84.58 × 83 × 3mm<sup>3</sup> was expurgated from the strawboard (based on simulation using a high-frequency structure simulator (HFSS) software), and a 3D-printed PB-72 substrate was used as concealment (over the SC) to ascertain its sensing capabilities in Industry sports and medicine (ISM) band. The sensing capabilities as insertion loss (S<sub>21</sub> parameters) were ascertained using a Vector network analyzer (VNA) followed by the calculation of effective dielectric-constant <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40032_2025_1233_Article_IEq1.gif" Format="GIF" Height="22" Rendition="HTML" Resolution="72" Type="Linedraw" Width="44" /> </InlineMediaObject> <EquationSource Format="TEX">\(\:{(\epsilon\:}_{eff})\)</EquationSource> </InlineEquation>. It has been observed from the results that there was a slight shift in the R<sub>f</sub> when the moisture content was between 2 and 4&#xa0;ml, but beyond that, there is a negligible shift in the R<sub>f</sub>, which statuses that PB-72 is a novel concealment solution for the preservation of heritage artefacts. The results suggest that the PB-72 substrate is thermally stable and moisture has an insignificant effect on R<sub>f</sub> for the sensor comprising of SC with PB-72 concealment; hence, it is recommended for condition monitoring of heritage artefacts.</p>

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On 3D Printed Paraloid B-72 Concealment Over Strawboard for Heritage Artefacts Preservation

  • 期刊论文

  • 发表日期：

    2025年6月21日

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  • Ankush Mehta,
  • Rupinder Singh,
  • Amrinder Pal Singh,
  • Jagdeep Singh,
  • Ranvijay Kumar

摘要

Numerous studies have reported using strawboard covers (SC) to preserve heritage artefacts. However, this solution has working limitations under the stimuli such as temperature, moisture, etc. Researchers used paraloid (P) B-72 to address this issue. But hitherto, little has been testified on the heritage artefacts monitoring using PB-72 concealment on SC. This study highlights the fabrication of a sensor for monitoring heritage artefacts based on the resonance frequency (Rf) concept with a micro-strip patch antenna (MPA). In this study, a substrate of PB-72 was 3D-printed and used as concealment on the SC upon which an Rf-based sensor was fabricated. For this study, a substrate of 84.58 × 83 × 3mm3 was expurgated from the strawboard (based on simulation using a high-frequency structure simulator (HFSS) software), and a 3D-printed PB-72 substrate was used as concealment (over the SC) to ascertain its sensing capabilities in Industry sports and medicine (ISM) band. The sensing capabilities as insertion loss (S21 parameters) were ascertained using a Vector network analyzer (VNA) followed by the calculation of effective dielectric-constant \(\:{(\epsilon\:}_{eff})\) . It has been observed from the results that there was a slight shift in the Rf when the moisture content was between 2 and 4 ml, but beyond that, there is a negligible shift in the Rf, which statuses that PB-72 is a novel concealment solution for the preservation of heritage artefacts. The results suggest that the PB-72 substrate is thermally stable and moisture has an insignificant effect on Rf for the sensor comprising of SC with PB-72 concealment; hence, it is recommended for condition monitoring of heritage artefacts.