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The Characteristics of the White Clay Pigment Manufactured from the White Clay of Producing Area Recorded in Old Documents

고문헌 산출지 백토로 제조된 백토안료의 특성 연구

  • Kang, Yeong Seok (Restoration Technology Division, National Research Institute of Cultural Heritage) ;
  • Mun, Seong Woo (Restoration Technology Division, National Research Institute of Cultural Heritage) ;
  • Jeong, Hye Young (Restoration Technology Division, National Research Institute of Cultural Heritage)
  • 강영석 (국립문화재연구소 복원기술연구실) ;
  • 문성우 (국립문화재연구소 복원기술연구실) ;
  • 정혜영 (국립문화재연구소 복원기술연구실)
  • Received : 2017.10.29
  • Accepted : 2017.11.27
  • Published : 2017.12.20

Abstract

An investigation on the records of old document was conducted to identify the producing area of white clay and there were on-the-spot surveys to secure raw materials of white clay pigment. Based on the survey results, six raw materials were obtained from the region of Gangwon-do and Gyeongsang-do, South Korea and white clay pigment was subsequently manufactured by applying the hydraulic elutriation method. The results show that the major constituent minerals of YBW, HBW, and MCW were quartz and plagioclase, whereas SGW, HOW, and HGW were composed of clay minerals such as kaolinite and illite. HGW showed the highest $L^*$-value of 92.9. HOW and HGW showed an opacity of 94.1% and 89.6%, respectively, and they had excellent spreadability (270.3 mm and 223.3 mm, respectively). Therefore, HGW, HOW, and SGW have excellent characteristics in terms of color, opacity, and spreadability, and are considered to be highly applicable as white pigments for the Dancheong.

고문헌에 기록된 산지 정보를 바탕으로 현지조사를 실시하고, 조사결과를 바탕으로 강원도, 경상도 지역 등에서 총 6개의 시료를 확보하였다. 확보된 시료를 대상으로 수비를 통해 백토안료를 제조하고, 물성 및 기능성 평가를 실시하였다. 백토안료의 주요 구성광물을 분석한 결과, YBW, HBW, MCW는 석영, 장석 등으로 이루어져 있으며, SGW, HOW, HGW는 카올리나이트, 일라이트 등의 점토광물이 주 구성광물을 이루는 것으로 확인되었다. 백토안료 HGW는 색도에서 가장 높은 92.9의 $L^*$값을 보였고, HOW와 HGW는 각각 94.1%, 89.6%의 높은 은폐율을 나타냈으며, 270.3 mm와 223.3 mm의 우수한 발림성을 갖는 것으로 확인되었다. 전체적으로 카올리나이트, 일라이트 등이 주요 구성광물을 이루는 HGW, HOW, SGW의 경우, 색도, 은폐력, 발림성 등에서 우수한 특성을 보였으며, 단청용 백색안료로서 활용가능성이 높은 것으로 판단된다.

Keywords

References

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