Water Resistance Evaluation of the Oils Coating for Conservation of Wooden Cultural Heritage

Abstract

Surface of the wooden cultural heritage has been protected from moisture by natural oils (such as perilla oil and tung oil), which accelerated degradation. But we can find seldom the research on the processes and performances of oil coatings. In this study, the water resistant performances by wood direction were compared to 3 types of natural oil and 2 types of oil stain, and the effect of additional indoor conditioning and temperature of oil were appraised in longitudinal direction. The natural oils block moisture about 79.2% comparing to the control in longitudinal direction. Especially the tung oil showed the outstanding water resistance about 90.5%. The water resistant performances decreased about 8.8% by additional indoor conditioning for 2 years. Heated oil improved the water resistance about average 5.0%.

Evaluation of Anti-Stain Efficacy of Myoung-oil, Traditional Coating Agent

“…우리나라 전통 건축물은 목재를 주요 재료로 하는 목 조건축물이 다수를 차지하고 있다 (Lee and Han, 2018). 목 재는 자연 친화적인 재료이며 내구성이 좋고 가공이 용이 하다는 장점이 있지만 외부 환경에 그대로 노출되어 있어 서 자외선이나 수분, 부후균, 해충 등에 의해 물리적, 화학 적, 생물학적인 열화가 발생하기 쉽다 (Kim et al, 2011;Kim et al, 2019;Na et al, 2015) Grown below 20% of exposed area 2 Grown between 20% and 40% of exposed area 3 Grown between 40% and 60% of exposed area 4 Grown between 60% and 80% of exposed area 5 Grown above 80% of exposed area Table 4. Criteria for evaluating anti-stained efficiency through visual observation Table 5.…”

Hygroscopicity and Ultraviolet (UV) Deterioration Characteristics of Finished Woods

“…By painting, wood can be protected from contamination, aging and damage of the material, and it can improve moisture resistance, water resistance, flame resistance, oil resistance, chemical resistance, insect repellency, antibacterial and abrasion resistance, etc. defects can be prevented (Jeong, 1994;DAPA, 2008;Na et al, 2015;Oh and Park, 2015;Hwang et al, 2018;Kim, 2018;Park et al, 2018;Arsyad et al, 2019;Park et al, 2021). However, there are many influencing factors compared to painting of other materials, such as the complex structure and properties of wood, differences in various species and characteristics, and shrinkage and expansion due to the effects of temperature and humidity.…”