• Title, Summary, Keyword: 습포법

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Removing Resin Contaminants from the Seated Stone Buddha (Korean Treasure No.84) of Sinboksa Temple Site in Gangneung (강릉 신복사지 석조보살좌상 보물 제84호 수지상 오염물 제거 방안 연구)

  • Lee, Byeonghoon;Go, Hyeongsun
    • Conservation Science in Museum
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    • v.15
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    • pp.56-65
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    • 2014
  • The face of the Seated Stone Buddha Korean Treasure No.84 of Sinboksa Templesite in Gangneung was contaminated with a glossy resin, spoiling its beauty. The contaminants covered the face, the forehead of the urna, to the bottom of the jaw. FT-IR analysis on a sample of the contaminants identified the substance as cyanoacrylate instant adhesive, which can normally be melted with acetone and removed with a swab. However, given that the surface of the statue was severely weathered from prolonged open-air exposure, alternative removal procedures were considered, to minimize the possibility of physical damage. After research, two removal procedures were utilized: one procedure involving poultices, which had been used to remove graffiti from the Samjeondobi Stele, and one procedure involving steam sterilization, which has been used to remove resin from pottery and porcelain. When both the poultices and steam sterilization were applied together, the resin was removed within twenty-four hours, without physical work using a swab.

Removal Methods of Paint Pollutants on the Stone Cultural Heritage using Poultices (습포제를 이용한 석조문화재의 페인트 오염물 제거기법 연구)

  • Lee, Joo-Wan;Ham, Chul-Hee;Kim, Sa-Dug;Lee, Chan-Hee
    • Journal of Conservation Science
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    • v.25 no.4
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    • pp.421-430
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    • 2009
  • This research was carried out focusing on the urgent treatment and related studies for paint scribbling on Samjeondobi Monument (Historic Sites No. 101) in 2007. Before the preliminary test, the paint lacquer used on the surface of Samjeondobi Monument was analyzed. The paint lacquer turned out to be the paint lacquer spray composed of $Pb_3O_4$ used for the red pigment in the market. It was proved that the poultice used with the organic solvent was the best way to remove the paint pollutants following the preliminary test for the removal of paint pollutants which was performed with various removal methods by the laser, etc. However, the removing the paint pollutants was found in difficulty in contrast to the preliminary tests because the paint on the spot was hardened so rapidly over time that there was difference from the situation of the laboratory. For that problem, the poultice method with ethylene dichloride of main component from Remover (goods in the market) was the most efficient, therefore the pollutants were removed with the solution of alkyds resin and nitrocellulose and the rest part was removed by the $Laponite^{(R)}$ RD.

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Chemical Cleaning of Iron Stains on Ceramics (화학세척제를 이용한 도자기의 철산화물 제거 특성 연구)

  • Park, Dae-Woo;Jang, Sung-Yoon;Nam, Byeong-Jik;Ham, Chul-Hee;Lim, Seong-Tae
    • Journal of Conservation Science
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    • v.27 no.4
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    • pp.345-356
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    • 2011
  • To remove metal stains of the ceramics, chemical cleaning is essential case by case. This study investigated the removal characteristics of iron stains by oxalic acid and citric acid including their application methods of soaking and poultice. The soaking method in cleaning agents showed removal process by color difference and released iron contents from iron stains on ceramics. Iron stains were removed successfully from ceramics, which soaked in oxalic acid for 60 hours. However, it is recommendable to soak in 0.25M oxalic acid for one to three hours because most iron stains were disappeared in 3 hours soaking. Citric acid is less effective than oxalic acid in removing iron stains because of heavy molecular weight and low acidity. Poultices (bentonite, sepiolite, activated carbon fiber and celite) with oxalic acid were applied on contaminated ceramics. After ten hours, iron stains on ceramics were removed successfully by poultice. Among them, bentonite and sepiolite have better application. Therefore, sepiolite with 0.25M oxalic acid was applied on the iron stains of whiteware and celadon from Ma Island, and then stains were removed. However, it is judged that the application methods can be varied according to the form and depth of contaminant. In addition, the residues of poultice on the ceramics will be considered for preventing contamination.

Present Deterioration Situation and Study on the Cleaning of the Surface of the Octagonal nine storied pagoda of Woljeongsa Temple (월정사팔각구층석탑의 손상현황과 표면오염물 제거연구)

  • Hwang, Jeong Eun;Kim, Sa Dug;Jung, Hee Soo
    • 보존과학연구
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    • pp.125-148
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    • 2012
  • The Octagonal nine storied pagoda of Woljeongsa Temple consists mainly of granite with the rockforming minerals quartz, plagioclase, microcline, and biotite. The surface of the stone stupa is light brown that has been discolored by the rust from the metal ornament and aids. The surface of the stylobate and roof stone is colonized by biological contaminants. Therefore, a comprehensive deterioration diagnosis was carried out in this study, and conservation treatment was conducted. It was proven that the $Fe^{2+}$ yield increases depending on the count of poultice used with oxalic acid, but the $Mg^{2+}$, $Al^{3+}$, and $Ca^{2+}$ yields were marginal following the preliminary test. Therefore, the use of poultice is an effective way of removing the rust, and only marginally influences the rock. The biological contaminants were removed through dry cleaning, and the soil located under the contaminants was removed through wet cleaning. Based on this, the dry and wet cleaning of all the biological contaminants, and the use of poultice with oxalic acid, were done to remove the rust. For the conservation treatment of the metal ornament, the rust was removed through physical cleaning, and anticorrosion treatment was performed on the iron ornament using Renaissance wax and copper ornament by BTA.

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Application Study of Dry-ice Pellet Cleaning for Removing Oil Paint and Lacquer of Outdoor Metal Artifacts (Dry-ice Pellet Cleaning 적용 옥외 금속문화재 표면 페인트 및 유성물질 제거방법 비교 연구)

  • Lee, Jee-Eun;Cho, Nam-Chul;Lee, Jong-Myoung;Yu, Jae-Eun
    • Journal of Conservation Science
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    • v.28 no.3
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    • pp.217-228
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    • 2012
  • Damage of cultural properties happens variously. Particularly, the surface damage of metal cultural properties exposed outdoors lowers historical and art historical value of artifact by artificial damage such as paint, scribbling containing oily material and so on. Therefore, this study compared dry-ice pellet cleaning with poultice when clearing paint and oily material environment-friendly, harmlessly to humans and without damage of artifact. As the result of experiment, when clearing those (paint and oily material) by poultice, oily paint was cleared, but there were spots of metal surface. Also, Lacquer spray wasn't well cleared, and resin came off the surface of artifact. When clearing those by dry-ice pellet cleaning, oil paint was cleanly cleared without surface damage of artifact according to Stereoscopic microscope observation, color-measurement, FT-IR, SEM analysis. Also, lacquer spray seemed to be cleared with the naked eye, but there were minute particles on surface according to the result of SEM observation. Consequently, we could confirm possibility of dry-ice pellet cleaning substitution.

The Study on Removing Paraloid B-72 from Painting Layer on Mural of Mireukjeon Hall at Geunsansa Temple (금산사 미륵전 벽화 채색층의 Paraloid b-72 제거방법과 안정성에 관한 연구)

  • Jin, Byung-Hyuk;Cho, Jae-Yeon;Park, Jin-Yeon;Han, Sung-Hee;Kim, Yong-Sun
    • MUNHWAJAE Korean Journal of Cultural Heritage Studies
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    • v.50 no.3
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    • pp.88-109
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    • 2017
  • As the technique to remove Paraloid B-72, which is known as an irreversible material, the method using organic solvent and heating, though the ways vary depending on the kind of material to be removed, has been usually used, but it has yet to apply to mud mural because of the technical limit in processing and the potential risk of damage and, moreover, the removal efficiency which also remains unproven. Thus, in a bid to seek the way to safely remove Paraloid B-72 contained in mural, the test was conducted in a way of applying a compress method, which is deemed most efficient. The solvents which are proven to be Paraloid B-72 were applied to the absorbents such as active carbon fiber and methyl cellulose and then were eluted to the surface of mud mural sample which was prepared in the same size and condition for a certain time before evaluating the stability and removal efficiency. Such test was intended to identify the applicability to the mural of Mireukjeon Hall at Geunsansa Temple, which had been treated with Paraloid B-72 for preservation in the past. As a result, the way of mixing the absorbent such as active carbon fiber and Xylene alone or with other quick vaporable solvents proved to be most efficient in removing Paraloid B-72 from mud mural and particularly Acetone:Xylene(1:1wt%) was found to be the most stable among others. Such a test outcome is expected to be a useful data for removing Paraloid B-72 from the mural of Mireukjeon Hall at Geunsansa Temple as well as for restoring other mural cultural assets in the coming days.