Journal of Conservation Science (보존과학회지)

The Korean Society Of Conservation Science For Cultural Heritage (한국문화재보존과학회)
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Proposal of the Measurement Conditions for Hanji-Determination Folding Endurance

한지 내절 강도 시험의 측정조건 제안

  • Kim, Myoung Nam (Restoration Technology Division, National Research Institute of Cultural Heritage) ;
  • Kim, Ji Won (Restoration Technology Division, National Research Institute of Cultural Heritage) ;
  • Son, Ha Nuel (Restoration Technology Division, National Research Institute of Cultural Heritage) ;
  • Jeong, Sun Wha (Restoration Technology Division, National Research Institute of Cultural Heritage)
  • 김명남 (국립문화재연구소 복원기술연구실) ;
  • 김지원 (국립문화재연구소 복원기술연구실) ;
  • 손하늘 (국립문화재연구소 복원기술연구실) ;
  • 정선화 (국립문화재연구소 복원기술연구실)
  • Received : 2021.10.14
  • Accepted : 2021.11.08
  • Published : 2021.12.20
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Abstract

This study aims to optimize the measurement conditions of handmade Hanji paper to reduce the time required for measurement while meeting folding endurance standards, for various basis weights. Thirteen types were selected, including 12 types of Hanji with grammages of 17 g/m2, 30 g/m2, and 45 g/m2, and one type of 75 g/m2 copy paper, and 24 sheets were prepared in the laid and chain directions. Subsequently, folding endurance experiments at different load (14.72 N, 9.81 N, 4.91 N) and specimen width conditions (15 mm, 10 mm, 5 mm) were performed, using a 4-MIT folding endurance tester. The results showed that, for specimen widths of 15 mm and 10 mm under a load of 4.91 N, the folding endurance falls within the reference range (10~10000 times). In particular, reduced folding endurance range and measurement time were observed at a width of 10 mm under a load of 4.91 N. Moreover, the endurance trend lines based on the average values of load and specimen width ranges enabled the prediction of the folding endurance within those ranges, according to the decreasing slope. Furthermore, for a specimen width of 15 mm under a load of 4.91 N, the folding endurance in the comparison group (35 to 17723 times) significantly exceeds the upper limit of the reference range (10~10000 times). Therefore, the measurement conditions of 4.91 N with a specimen width of 10 mm are proposed.

본 연구는 수초지의 한지에 있어서도 다양한 평량에 맞는 기본적인 내절도 측정조건이 요구됨에 따라 내절도 범위 부합과 측정시간 단축을 목적으로 하였다. 연구대상으로 평량 17 g/m2, 30 g/m2, 45 g/m2에 해당하는 외발초지 6종과 쌍발초지 6종, 평량 75 g/m2 복사지 1종 등 총 13종을 선정하고 발촉방향(LD), 발끈방향(CD)으로 각 24매씩 준비하였다. 연구방법으로 종이-내절 강도 시험에 따라 4연식 MIT 내절도 측정기를 이용하여 하중별(14.72 N, 9.81 N, 4.91 N) 내절도 실험과 시편폭별(15 mm, 10 mm, 5 mm) 내절도 실험을 순차 수행하였다. 연구결과, 평량 17 g/m2~45 g/m2 범위의 한지에 대하여 하중 4.91 N 조건과 시편폭 15 mm, 10 mm 조건이 내절도 기준범위인 10~10000회에 부합하였으며, 특히 시편폭 10 mm에 하중 4.91 N 조건이 내절도의 범위 축소와 측정시간 단축이 가능하였다. 또한, 평균값 기준 하중별 내절도 추세선과 시편폭별 내절도 추세선의 감소기울기를 통해 하중 범위, 시편폭 범위 내의 내절도 예측이 가능해졌다. 하중 4.91 N, 시편폭 15 mm 조건에서도 비교군의 내절도가 35~17723회로 기준범위 10~10000회를 크게 상회하므로 내절도 기준범위 부합과 측정시간 단축을 고려하여 하중 4.91 N, 시편폭 10 mm의 내절도 측정조건을 제안한다.

Keywords

Acknowledgement

이 연구는 2021년도 문화재청 국립문화재연구소 문화유산 조사연구(R&D) 사업의 지원을 받아 이루어졌으며 행정적 및 재정적 지원에 깊이 감사한다.

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