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The Characteristics of Particle Size in Natural Mineral Pigment for Azurite Raw Material

남동광석(Azurite) 원료 천연 광물 안료의 입도분포 특징

  • Go, In Hee (Restoration Technology Division, National Research Institute of Cultural Heritage) ;
  • Jeong, Hye Young (Restoration Technology Division, National Research Institute of Cultural Heritage) ;
  • Park, Ju Hyeon (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)
  • 고인희 (국립문화재연구소 복원기술연구실) ;
  • 정혜영 (국립문화재연구소 복원기술연구실) ;
  • 박주현 (국립문화재연구소 복원기술연구실) ;
  • 정서린 (국립문화재연구소 복원기술연구실) ;
  • 조아현 (국립문화재연구소 복원기술연구실)
  • Received : 2015.08.31
  • Accepted : 2015.12.03
  • Published : 2015.12.20

Abstract

This study were conducted the particle-size analysis on 57 blue pigments to understand the step distribution characteristics of blue pigments made out of Azurite by using Malvern's Mastersizer 2000. As the result, most of the conventional blue pigments in Korea, Japan, and Chinese showed good granularity step separation except for few, and the smaller the particle, the more the Span value increased and the wider the granularity distribution range. On the basis of Friedman and Sanders's Grain size, most of the pigments were sand size to silt size. 72.2% of B-100 was clay size and 2.5% of A-14 was gravel size. Even the same components can differ by the grain size directly affecting the important property such as color formation, oil absorption, specific gravity, usability, etc. so the information about the granularity distribution would be used for basic data to deal with natural pigments.

본 연구에서는 천연 안료 중 남동광(Azurite)으로 제조된 청색계열 안료 입도의 단계별 분포특성을 파악하고자 국내 외 청색계열 안료 57종을 선정, Malvern사의 Mastersizer2000을 이용하여 입도분석을 실시하였다. 실험 결과, 국내 외에서 시판되고 있는 청색 안료 일부를 제외하고는 비교적 단계별 입도 분리가 잘 되어 있으며, 안료의 입도가 작아질수록 Span 값은 증가하고 입도 분포 범위는 넓어지는 특징을 확인할 수 있었다. Friedman and Sanders가 제안한 Grain size를 기준으로 보면 대부분의 안료는 주로 모래와 실트영역에 해당하였으며 B-100은 72.2%가 점토영역에 해당되었고 A-14는 자갈에 해당하는 영역이 2.5%를 차지하였다. 나아가 동일 성분의 안료라 할지라도 입자 크기에 따라 안료의 발색특성이 다르며 흡유량, 비중, 작업성 등 중요물성에 밀접한 영향을 미친다. 이에 대한 추가적 실험이 필요하며 물리적 특성과 입도분포 특징에 대한 정보는 천연 안료의 취급을 위한 기초자료로 활용될 수 있을 것이다.

Keywords

References

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Cited by

  1. Mineral Compositions of Korean Dancheong Pigment Products using Quantitative XRD vol.32, pp.3, 2016, https://doi.org/10.12654/JCS.2016.32.3.11
  2. Occurrence and Mineralogical Properties of Green-Blue Inorganic Pigments in Korea vol.31, pp.1, 2018, https://doi.org/10.9727/jmsk.2018.31.1.33