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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Conservation Science
Journal Basic Information
Journal DOI :
The Korean Society Of Conservation Science For Cultural Properties
Editor in Chief :
Volume & Issues
Volume 28, Issue 4 - Dec 2012
Volume 28, Issue 3 - Sep 2012
Volume 28, Issue 2 - Jun 2012
Volume 28, Issue 1 - Mar 2012
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Compressive Strength of Waterlogged Archaeological Wood after PEG Treatment with Concentration and Solvent
Kim, Soo-Chul ;
Journal of Conservation Science, volume 28, issue 2, 2012, Pages 95~99
DOI : 10.12654/JCS.2012.28.2.095
The compressive strength of PEG along processing concentration and solvent is willing to be measured and proper processing condition for exhibition and storage is also willing to be measured by comparing with dimensional stability. In the advanced research of setting PEG-preprocessing concentration & solvent for freeze drying of waterlogged archaeological wood of high water content, vacuum freeze drying showed the highest dimension stability after 40% PEG-preprocessing of aqueous solution. In this study, the compressive strength increased in proportion of processing concentration and water showed the relatively-higher compressive strength than t-butanol regarding solvent. Especially, it showed that there is no big strength difference between PEG 40% and PEG 50% in aqueous solution by 6.6%(16kgf/
). According to the above results, it was recognized that it is most effective to implement freeze drying after 40% PEG-preprocessing when want to dimensional stability and compressive strength simultaneously.
Characterization and Analysis of Painted Pigments for the Clay Statues in Donggwanwangmyo Shrine, Seoul
Lee, Chan-Hee ; Yi, Jeong-Eun ; Han, Na-Ra ;
Journal of Conservation Science, volume 28, issue 2, 2012, Pages 101~112
DOI : 10.12654/JCS.2012.28.2.101
The Donggwanwangmyo Shrine was built in the period of Joseon Dynasty in 1602. There are Clay Statues (Gwanwo, Jangbi, Woojanggun, Juchang, Jojaryoung and so on) enshrined in the inside of the main hall. Original color of these Clay Statues are deteriorated by inorganic pollutant like dust. And the origanal forms were damaged during several process of restorations and repaintings. This study carried out XRD, SEM-EDS, P-XRF and chromaticity measurement for characterization of pigments which painted on Clay Statues. As a result, cinnabar, hematite and red lead were used to paint in pigments for the red and brown colors. Light red pigment was made by gypsum with these minerals that make colors. Graphite and gold were used to color of black and gold pigment, respectively. Green pigment is identified of malachite, atacamite and glauconite. Blue pigment which is clearly painted on Clay Statues is interpreted a morden industrial pigment that were painted at repair work. White pigments are detected calcite, gypsum and silver white. Orpiment and litharge were used to color of yellow and light yellow pigment.
The Analysis on VOCs That Occurs in Leather Cultural Heritage with SPME
Chung, Yong-Jae ;
Journal of Conservation Science, volume 28, issue 2, 2012, Pages 113~118
DOI : 10.12654/JCS.2012.28.2.113
Cultural heritages emit volatile organic compounds(VOCs) during degradation as chemical, biological factors. These VOCs in the atmosphere are degradation factors for another materials. But non-destructive organic analysis methods are uncommon, and have difficulties for field application. In this study, solid phase micro-extraction(SPME) and gas chromatography( GC) are carried out for analysis of VOCs which are emitted from leather, and prove SPME field holder's efficiency. I analize leather archival objects at The National Archives of Korea by cross-checking GC and SPME methods. It could be confirmed that the compounds are (E)-2-nonenal, butyl hydroxy toluene emitted itself from leather.
Analysis of Dyes and Mordants of 16~17th Century Textiles Excavated from Daejeon
Baek, Young-Mee ; Kwon, Young-Suk ; Goto-Doshida, Sumiko ; Saito, Masako ;
Journal of Conservation Science, volume 28, issue 2, 2012, Pages 119~129
DOI : 10.12654/JCS.2012.28.2.119
Excavated textiles provide very important research data on the costume culture of the Joseon dynasty. In particular, dyed textiles are indispensable for textile conservation research and for restoration of remains as well as for general costume culture research. Unfortunately, a prolonged burial environment causes the colors to change and gradually fade after excavation. Therefore, it is very difficult to identify the original color. In this study, natural dyed samples of red, yellow, purple and blue were prepared and analyzed using HPLC-PDA. Dyes of colorants extracted from excavated textile remains were analyzed by HPLC. In addition, mordants were analyzed using (SEM-EDX) in order to estimate the original color. The 16~17th Century's three samples were analyzed, sample 1, and 2 from Eunjin Song's Song Mun-Chang excavated at the Songchon-dong in Daejeon, and sample 3 from Yeosan Song's Song, Hee-Jong excavated at the Mokdal-dong in Daejeon. From the HPLC results, alizarin, purpurin, and indigo were detected on sample 1, alizarin and purpurin on sample 2, ellagic acid and indigo on sample 3. Therefore they were dyed with madder and indigo (sample 1), madder (sample2), pomagranted and indigo (sample 3). Al mordant was identified on three samples.
Tuning Exothermic Curing Reaction of Hydrogenated Bisphenol A Epoxy Resins for Stone Conservation
Choi, Yong-Seok ; Park, You-Jin ; Kang, Yong-Soo ; Won, Jong-Ok ; Kim, Jeong-Jin ; Kim, Sa-Dug ;
Journal of Conservation Science, volume 28, issue 2, 2012, Pages 131~139
DOI : 10.12654/JCS.2012.28.2.131
The exothermic cure kinetics of epoxy resin was controlled by hardener containing fast and slow curing agents. The epoxy risen comprises hydrogenated bisphenol A-based epoxide (HBA), fast curing agent (FH) and slow curing agent poly(propyleneglycol)bis(2-aminopropylether) (SH). Talc was used as an inorganic additive. In the process of curing, cure kinetics along with temperature was monitored by differential scanning calorimeter (DSC) and thermocouple to show that the temperature increase was well controlled by adjusting the hardener mixture. Additionally, bending and tensile strengths of the epoxy/talc composites were also measured to be lower and higher with the amount of the talc inorganic additive, respectively. It is thus concluded that the increase in the temperature during exothermic curing reaction and mechanical properties of epoxy resins are tuned by optimizing hardener mixture for successful stone conservation.
A Study on the Anchorage Length of Metal Stiffeners for the Structural Reinforcement of Stone Cultural Heritages
Kim, Sa-Dug ; Lee, Dong-Sik ; Kim, Hyun-Yong ;
Journal of Conservation Science, volume 28, issue 2, 2012, Pages 141~151
DOI : 10.12654/JCS.2012.28.2.141
It was the 1900s that the damaged materials of stone heritages began to be preserved and managed for the purpose of reuse, especially since cement, an inorganic material, began to be used during the Japanese colonial period. Epoxy resin, an organic material, was introduced to architecture around the turn of the 1990s, and has been being used across the board. In particular, filler mixtures began to be aggressively used for the structural reinforcement of severed materials. The problem was metal stiffeners used for structural reinforcement. The anchorage length varied depending in different conservation scientists, and as a result the secondary damage was apt to occur in the materials. In this study, hereat, a calculation was made of the most effective anchorage length with the minimization of material damage. The results were as in the following: the anchorage length of an 8-milimeter-across (ø8) metal stiffener was found to be most effective at 60.88mm. Those of ø12 and ø16 were 60.88mm and 91.32mm respectively. In the case of other calibers, the anchorage length was calculated by a formula
. In the experiment, helically-threaded round bars were used as metal stiffeners in order that they could bear surcharge loads such as bending, shear and constriction.
Evaluation of Slope Stability and Deterioration Degree for Bangudae Petroglyphs in Ulsan, Korea
Lee, Chan-Hee ; Chun, Yu-Gun ; Jo, Young-Hoon ; Suh, Man-Cheol ;
Journal of Conservation Science, volume 28, issue 2, 2012, Pages 153~164
DOI : 10.12654/JCS.2012.28.2.153
The major petroglyphs of Bangudae site were composed mainly of hornfelsed shale. Surface of the rock was formed weathering layer (average porosity 25%) that discriminated mineral and chemical composition against fresh rock (average porosity 0.4%). The lost area of major petroglyphs in the past up images carved to the present was calculated about 23.8%. And occurrence area of exfoliation indicated 1.2% of the whole petroglyphs. As a result of the chromaticity analysis, color of the major petroglyphs was changed brighter and yellower than fresh rock by chemical and biological weathering factors. Average ultrasonic velocity of petroglyphs was measured 2,865m/s. This result indicated that ultrasonic velocity decreased especially bottom of petroglyphs than measured result in 2003 year. The results of the evaluation for slope stability, it identified the possibility of toppling, planar and wedge failure in host rock. The 3D image analysis and modeling data of the cavern obtained for structural reinforcement.
Analysis of Characterization on Ancient Ink Stick
Nam, Tae-Gwang ; Shin, Soo-Jeong ; Park, Won-Kyu ; Kim, Byung-Ro ;
Journal of Conservation Science, volume 28, issue 2, 2012, Pages 165~173
DOI : 10.12654/JCS.2012.28.2.165
In this work, scientific and systematic analysis was conducted for finding out the methods and techniques of ancient ink stick making. Analysis the ancient ink stick on ancient documents and wooden writing as letter or painting, we concluded as followings. From the analysis of ancient wood by dendrochronology, wood was cut at 1899, which provided the information on the year of ink stick's made on writing on ancient wood. Single particle size for soot of ancient ink stick was 107 nm for ink on the roof-filling timber in Sinsunwonjeon of Changdeok Palace, compared to 38 to 86 nm on the letter on ancient 12 paper document. Aggregate particle size was 370 nm for ink on the roof-filling timber in Sinsunwonjeon of Changdeok Palace, but 206 to 318 nm for aggregate particle size on 12 paper documents. There was similar pattern between single particle size and aggregate particle size of soot, which might provide the information of raw material for ancient ink. From infra-red and Raman spectroscopic analysis of sheet of writing on paper or wood, there was severe interference from background material (paper or wood). From Raman spectroscopic analysis of ancient ink carefully separated from ancient wood, spectrum pattern was closer to ink stick made by the soot from pine burning.
Analysis of Bronze Artifacts and Gold Ornaments Excavated from Xiongnu Tombs No. 2~4 at Duurlig Nars in Mongolia
Yu, Hei-Sun ;
Journal of Conservation Science, volume 28, issue 2, 2012, Pages 175~184
DOI : 10.12654/JCS.2012.28.2.175
A purpose of this research is to find out characteristic of bronze artifacts and gold ornaments excavated from Xiongnu tombs No. 2~4 at Duurlig Nars in Mongolia through scientific analysis of them. The Tombs are comparatively small. There were still lots of relics remaining although the tombs had been already robbed. Also the tombs are evaluated important since the origin of them show coexisting of chinese and northern style. First of all, an analysis result about bronze vessels found in this site, they have high lead(Pb) content and relatively low tin(Sn) content, as compared with the Bronze Han Mirror and End-fittings of Bronze Parasol Rib. Especially in case of bronze tray and bronze lamp from the no. 2 tomb and also bronze cauldron from the no. 4 tomb contain only 1wt% of tin which means binary alloy composition(Cu-Pb). Also, in the case of gold ornaments found in the no. 2 tomb, they have comparatively high purity. And the research suppose that the high possibility of that they were used soldering using alloy of Au-Cu or diffused bonding(using malachite and copper oxide) for joining gold grains of gold granulation ornament. Further scientific research and analysis in Mongolia and other countries will provide more clues to solve mystery of Xiongnu culture.