Journal of Conservation Science (보존과학회지)

The Korean Society Of Conservation Science For Cultural Heritage (한국문화재보존과학회)
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A Study on the Physical Properties of Seokrok and Noerok Used as Green Pigment

녹색안료로 사용되는 석록과 뇌록의 물리적 특성 연구

  • Park, Ju Hyun (Restoration Technology Division, National Research Institute of Cultural Heritage) ;
  • Jeong, Hye Young (Restoration Technology Division, National Research Institute of Cultural Heritage) ;
  • Go, In Hee (Restoration Technology Division, National Research Institute of Cultural Heritage) ;
  • Jeong, Sir Lin (Restoration Technology Division, National Research Institute of Cultural Heritage) ;
  • Jo, A Hyeon (Restoration Technology Division, National Research Institute of Cultural Heritage)
  • 박주현 (국립문화재연구소 복원기술연구실) ;
  • 정혜영 (국립문화재연구소 복원기술연구실) ;
  • 고인희 (국립문화재연구소 복원기술연구실) ;
  • 정서린 (국립문화재연구소 복원기술연구실) ;
  • 조아현 (국립문화재연구소 복원기술연구실)
  • Received : 2015.10.27
  • Accepted : 2015.12.09
  • Published : 2015.12.20
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Abstract

The purpose of this study is to analyse the properties of Seokrok and Noerok that are used for restoration of heritage and arts. Malachite is main constituent mineral for Seokrok and Celadonite is Main component of Noerok. To evaluate the physical properties of pigment, A,B-class Seokrok and heated Seokrok that are sold in market were selected. To compare this results, Noerok sold in Japan were studied. In addition, we studied the pigments of Noerok. The heat treatment had no significant effect on the physical properties, except for the color-difference. The color-difference of Seokrok is larger than that of the Noerok sold in Japan. The $a^*$ values of Seokrok specimens are horizontal distribution, so it will expand the coloring ranges. The properties that are chromaticity, specific gravity and oil-absorption of Noerok are different from Seokrok. Noerok is suggested that achromatic color because the values of $a^*$ located near zero. Specific gravity of Noerok is smaller than Seokrok, but oil-absorption is larger twice. Noerok and Amnok, although ingredients are different, it is possible to use alternative because of similar physical characteristics. The result from this study expects to be used as useful referencing data for conservation and restoration of cultural heritage and understanding phenomena of the properties.

문화재 복원을 비롯한 회화용으로 많이 사용되는 녹색 안료 중 천연 무기안료인 석록과 뇌록의 물리적 특성 규명을 위하여 본 연구를 수행하였다. 석록은 Malachite가 주 구성광물이고, 뇌록은 Celadonite가 주 구성광물이다. 본 연구를 위하여 K사(社)의 A등급 석록, B등급 석록, 소성석록의 물리적 특성을 평가하였으며, 이와 비교하기 위하여 J사(社)의 송엽녹청, 소녹청을 평가하였다. 뇌록은 K사(社)의 뇌록을 평가하였다. 석록 및 송엽녹청의 소성 여부는 색도를 제외한 다른 물리적 특성에 큰 영향을 미치지 않는 것으로 판단되며, K사(社)의 석록과 소성석록과의 색차가 J사(社)의 송엽녹청과 소녹청의 색차보다 훨씬 높았다. K사(社)는 녹색도 $+a^*$가 J사(社)보다 가로로 넓게 분포하여 녹색의 다양한 색표현이 가능하다. 뇌록은 색도, 비중, 흡유량 등의 물리적 특성이 석록과는 많은 차이를 보였다. 뇌록의 색도는 $a^*$가 0에 가까이 분포하여 석록에 비하여 무채색에 더 가까웠고, 비중은 석록에 비해 작고, 흡유량은 2배 정도 컸다. 또한 뇌록과 암녹은 비록 구성 물질에 차이가 있어도 물리적 특성이 비슷하여 대체하여 사용 가능 할 것으로 보인다. 본 연구결과를 통하여 천연안료의 물리적 특성을 규명하여 품질기준을 확립하고, 문화재 보존, 복원의 선택적 사용에 대한 기초적인 자료로 활용되길 기대한다.

Keywords

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