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포화염용액 습도시스템에 의한 수중 발굴 도자기의 이온용출 특성 연구

A Study on Ion Extraction Characteristics of Ceramics from Marine Archaeological Sources by the Saturated Solution Humidity System

장성윤|남병직
한국문화재보존과학회 (The Korean Society Of Conservation Science For Cultural Properties)|2013.12|보존과학회지 (Journal of Conservation Science)|제29권 제4호|pp. 421-435|DOI http://dx.doi.org/10.12654/JCS.2013.29.4.12

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참고문헌

키워드

흡수율AbsorptionPorosity수용성 염Soluble salt수중 발굴 도자기포화염용액기공률Underwater ceramicsSaturated solution
주제분류자연과학일반

초록

본 연구는 수중 발굴 도자기에 있어 상대습도 조건에 따른 수용성 염의 표면거동을 조사하여 도자기 보존관리에 적합한 환경기준을 제시하고자 한다. 실험 24주간 전기전도도 누적총량(㎲/㎝)으로 [고습조건(RH70%+RH80%)/저습조건(RH20%+RH40%)]의 상대적 비율 분석결과, 고습조건이 저습조건에 비해 이온용출량이 증가하였고, 특히 청자시료의 경우 그 증가폭이 두드러졌다. 또한 고습조건 시편들의 전기전도도 누적총량을 시료의 물리적 특성과 비교한 결과, 이온용출량은 시료의 흡수율 및 기공률의 증가에 따라 비례하였다. 수중 발굴 도자기는 매장환경의 특성상 염에 의한 물리·화학적 손상 및 2차오염이 크게 우려된다. 따라서 도자기의 이상적인 보존에는 습도변화에 비교적 안정적인 저습조건의 항온항습 수장고가 권장되며, 수장고 설비에 있어 시료의 재질특성에 따른 사전분류가 선행될 필요가 있다.

Abstract

The purpose of this study is to suggest environmental guidelines for the conservation of ceramics excavated from underwater. Accordingly, the conditional change of the soluble salt on surface of the excavated ceramics was examined by changing the relative humidity. Examining the relative ratio [high humidity(RH70%+RH80%)/low humidity(RH20%+ RH40%)] for 24 weeks using accumulated conductivity(㎲/㎝), the result showed that the amount of ion elution increased more in high humidity than in low humidity. In particular, the ion elution increased significantly within the celadon sample. In addition, comparing the accumulated conductivity and physical characteristics of the samples in high humidity, the results indicated that the amount of the ion elution is proportioned to the increased rate of the sample’s absorption capacity and porosity. Ceramics excavated from underwater has risks of the secondary physical and chemical attacks from remaining salts. Therefore, it is suggested these ceramics be stored in a storage which maintains proper temperature and low humidity conditions. Also, the collections need to be pre-classified according to the properties of the materials.

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