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Consideration of Making Techniques for Red Painted Roof Tiles from Presumed Site of Daetongsa in Gongju Using Nondestructive Analysis

비파괴 분석을 활용한 공주 대통사 추정지 출토 주칠흔 기와의 제작기술 검토

  • Lee, Chan Hee (Department of Cultural Heritage Conservation Sciences, Kongju National University) ;
  • Lee, Gyu Hye (Department of Cultural Heritage Conservation Sciences, Kongju National University) ;
  • Jung, Je Won (Chungcheongnam-do Institute of History and Culture)
  • 이찬희 (공주대학교 문화재보존과학과) ;
  • 이규혜 (공주대학교 문화재보존과학과) ;
  • 정제원 (충청남도역사문화연구원)
  • Received : 2020.06.30
  • Accepted : 2020.09.29
  • Published : 2020.10.20

Abstract

The Daetongsa temple is the earliest temple to be constructed during the era of the Three Kingdoms in ancient Korea. The main architect, purpose, and name of the temple have been confirmed through ancient literature and archeological materials carved in the Chinese letter, Daetong, excavated around Gongju. However, the location and range of the temple have remained elusive and were discussed in various studies. In this study, we examine the roof tiles obtained from the presumed site of the Daetongsa temple. The tiles were found to contain traces of red paint (red pigments) on their surface and analyzed using nondestructive techniques. The results imply that roof tiles were made using clay tablets and wooden cylinders, with latticed cloth in between. Additionally, some wooden cylinders appeared to comprise numerous wooden plates tied together by strings. The clay tablets used to make the roof tiles were produced from the source clay via the sorting process. The traces of red paint on the surface of the roof tiles were verified to be traditional pigments used for painting wooden buildings. These pigments were extracted from red ocher or red clay (Seokganju), mainly consisting of iron oxide. In the literature, the location of provenance sites for Seokganju is estimated to be far from Gongju. However, the materials for extracting the red pigments were relatively easy to source because most rocks comprised iron oxides. Therefore, it is necessary to discuss the provenance of the red pigments around the presumed site of Daetongsa.

대통사는 삼국시대 사찰 중에서 가장 이른 시기에 창건된 것으로 알려져 있다. 창건주체와 목적 및 사찰명 등은 고문헌과 공주지역에서 출토된 '대통' 명의 유물에서 확인할 수 있으나, 사찰의 위치와 사역에 대해서는 다양한 논의가 진행 중이다. 이 연구에서는 공주 반죽동 일대의 대통사 추정지에서 출토된 주칠흔(적색안료) 기와에 대해 비파괴 분석으로 제작기법을 검토하였다. 연구대상 기와의 등면에는 주칠흔이 선명하며, 원료는 정선과정을 거친 것으로 나타났다. 또한 태토를 점토판으로 제작하여 와통에 포목을 둘러 붙이는 방식으로 성형하였으며, 일부 기와는 모골와통을 활용한 것으로 판단된다. 한편 등면에서 나타나는 주칠흔의 산출상태와 조성으로 볼 때 산화철을 주성분으로 하는 석간주 또는 주토를 활용한 단청 안료로 해석된다. 고문헌에 알려진 석간주의 산출지는 공주에서 원거리에 있으나, 산화철은 다수의 암석에서 비교적 쉽게 나타나는 물질로서, 근거리의 원료수급과 관련하여 대통사 추정지를 중심으로 추가적인 검토가 필요하다.

Keywords

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