한국광물학회지 (Journal of the Mineralogical Society of Korea)

  • 제32권4호
  • /
  • Pages.259-271
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  • 2019
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  • 1225-309X(pISSN)
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  • 2288-7172(eISSN)
한국광물학회 (The Mineralogical Society of Korea)
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적색 및 황색 계열의 천연 무기안료의 광물학적 특성 및 촉진내후성 평가 연구

A Study on Mineralogical Characteristic and Accelerated Weather Test of Red and Yellow Color Natural Inorganic Pigments

  • 박주현 (국립문화재연구소 복원기술연구실) ;
  • 정혜영 (국립문화재연구소 복원기술연구실)
  • Park, Ju Hyun (Restoration Technology Division, National Research Institute of Cultural Heritage) ;
  • Jeong, Hye Yeong (Restoration Technology Division, National Research Institute of Cultural Heritage)
  • 투고 : 2019.10.22
  • 심사 : 2019.11.28
  • 발행 : 2019.12.30
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초록

채색 문화재 및 전통회화의 적색, 황색 안료로 사용되는 진사, 웅황, 그리고 자황의 광물학적 특성을 분석하고 촉진내후성 평가를 통한 안정성을 평가하였다. 진사는 시료명을 JB, JS로 하였고, 웅황과 자황은 각각 UH, JH로 하였다. 광물학적 특성 평가 결과 JB, JS는 cinnabar (HgS)로 주구성 광물이 확인되었고, 품위에 따른 화학성분에 차이를 보이지 않았다. UH와 JH는 각각 realgar (AsS), orpiment (As2S3)로 주구성 광물이 확인되었다. 편광현미경 관찰 결과 쪼개짐, 색상 등 편광학적 특성을 통해 모두 천연적으로 생성된 무기안료임을 알 수 있었다. 특히 진사의 경우 성분분석으로는 천연적으로 생성된 안료인지 인공안료인지 판별이 쉽지 않은데 편광현미경을 통해 천연안료가 가지는 입자특성 및 쪼개짐을 확인하였으며, 열적 반응 특성을 확인하였다. 열분석 결과 JH가 UH에 비해 유리전이 온도가 높고 안정한 것을 확인하였다. 촉진내후성 평가 결과 진사, 웅황 그리고 자황은 모두 광열화에 의한 색변화가 크게 나타나며, 진사는 최종적으로 흑색(blackening)되고 웅황과 자황은 밝은 노란색으로 변한다. Meta-cinnabar로 예상되는 JB가 cinnabar인 JS에 비해 흑화현상이 더 빨리 촉진되었으며, UH (realgar)는 광조사에 의해 arsenolite (As2O3)로 변하는 것을 확인하였다.

We evaluated mineralogical, physical property and accelerated weather resistance of cinnabar, realgar and orpiment used as cultural heritages and traditional paintings. JB and JS are sample names of cinnabar and JH and UH are sample names of orpiment and Realgar, respectively. As a result of mineralogical property evaluation, Jinsa was identified cinnabar (HgS) and there was no difference in chemical composition according to the grade. UH and JH were confirmed realgar (AsS) and orpiment (As2S3), respectively. The polarization characteristics such as shape and color indicate that pigments using our test were natural mineral pigment observed by polarization microscope. Especially, in the case of cinnabar, it is not easy to distinguish between natural mineral pigment and synthetic pigment. But the results of polarization microscope said that cinnabar is natural occurring mineral which have authentic mineral particle and unevenly fracture. As a result of thermal analysis, JH has a higher glass transition temperature and heat stability than UH. After accelerated weather test, cinnabar, realgar and orpiment were striking result in color change because of light degradation. Red color of cinnabar turn into black and the color of realgar and orpiment became brighter than before. JB (meta-cinnabar) is more photosensitivity and faster becoming dark than JB (cinnabar). Finally light transforms realgar (red, As4S4) in arsenolite (As2O3).

키워드

참고문헌

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