건축문화유산의 전통 표면 마감제인 명유 재현과 내후성 평가 기초연구
A Foundational Study on Restore and Evaluation of Decay Resistance of Myeong Yu(-oil), Traditional Coating Agent for Architectural Cultural Heritage
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참고문헌
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초록
현재 전통 명유에 대한 재료나 제조법 등 정확한 기록이 없어 문헌을 통해 재현하기 위한 연구들이 이루어지고 있다. 그러나 재료 자체가 단절되었고 재현한 명유 성능에 대한 정보가 부족하여 다양한 논의가 필요한 시점이다. 본 연구에서는 문헌에 기록된 제조방법과 선행연구를 참고하여 명유를 재현하고, 내후성 평가를 통해 명유 재현 성능 향상에 미치는 영향을 분석하였다. 주재료(법유, 황단, 무명석, 백반)의 배합 조건을 달리하여 총 24가지의 명유를 재현하고 점도 측정을 통해 명유의 물성을 확인하였다. 이후 마감재 적용 가능성을 확인하기 위하여 의사 시편을 제작하여 내후성 실험을 진행하였으며, 실험 전⋅후 광학적 조사와 색차 변화, 접촉각 측정을 통해 변화양상을 분석하였다. 연구 결과, 건조촉진제 역할을 하는 납계 안료와 무명석을 첨가한 T11, T12은 상대적으로 점도가 낮은 물성을 지녀 단청 도막을 형성하는 데 효과적으로 파악된다. 또한 해당 시료로 제작된 시편은 내후성 실험 후 자외선에 의해 광열화에 따른 미약한 광변색이 발생하였으나 수분에 대한 저항성과 내구성이 안정적인 경향을 나타내는 것으로 보여 건축문화유산의 표면 마감재로서 적용 가능한 것으로 판단된다.
Abstract
No accurate records are currently available on the materials or manufacturing methods of traditional myeong yu, inducing research efforts for its recreation based on historical documents. However, further study of the recreated myeong yu is required because there is limited information on its performance and the original materials are no longer in use. Herein, myeong yu was recreated based on documented manufacturing methods, and the factors affecting its performance were analyzed via weather resistance testing. To recreate myeong yu, 24 samples with different combinations of the primary materials(i.e., perilla oil, huangdan, pyrolusitum, and alum) were produced and thephysicalpropertiesofthesamples were assessed based on their viscosity. The suitability of myeong yu as a surface finishing agent was evaluated by using it to prepare mock specimens and subjecting them to weathering tests . Optical analysis, color difference measurements, and contact angle testing were conducted to assess the changes in the samples before and after the weathering tests. Two samples (T11 and T12) comprising lead-based pigments and pyrolusitum as drying accelerants demonstrated low viscosity and effectively formed protectivelayers on dancheong(a traditional decorative painting). Although the prepared specimens exhibited photodegradation-related discoloration due to ultraviolet exposure after the weathering tests, they exhibited stable moisture resistance and durability, indicating the potential of the samples as surface finishing agents for architectural cultural heritage preservation.
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