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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 31, Issue 4 - Dec 2015
Volume 31, Issue 3 - Sep 2015
Volume 31, Issue 2 - Jun 2015
Volume 31, Issue 1 - Mar 2015
Selecting the target year
Study About Filling-Material for Clay Layer Restoration of Seated Amitabha Triad at Muwisa Temple (Treasure No. 1312)
Lee, Su Yea ;
Journal of Conservation Science, volume 31, issue 1, 2015, Pages 1~11
DOI : 10.12654/JCS.2015.31.1.01
Seated Amitabha Triad at Muwisa Temple (Treasure No. 1312) had been known as wooden Buddha statue, but a precise safety inspection revealed that the statue is terracotta Buddha statue made with clay. The clay layer of Amitabha Triad was conserved due to its severe damage. In this study, experiments were conducted to produce the most appropriate filler for the conservation treatment of the seated Amitabha Triad. Mixed clay samples with various ratios were produced and surface hardening state, crack, color change, and shrinkage of the samples during dry process were measured. Loess, fine sand powder, and cotton were used to produce the mixed clay for the filler with six different ratios and then 12 different concentration glues made with glutinous rice glue, Pachymeniopsis Elliptica glue, and animal glue were added as adhesives. Total 72 types of samples were prepared and comparative study was conducted. As a result, when the mixed clay contains 2.5% cotton compared to the weight per cent of loess and fine sand powder and also loess and fine sand in the mixed clay have a 15:1 ratio, the mixed clay had the lowest shrinkage. Animal glue is considered as an appropriate glue since it had small color change, low physical property change and shringkage. Therefore, mixed clay (loess:fine sand=15:1) mixed with 15ml animal glue is likely to be a suitable filler for conservation treatment of the seated amitabha triad at the Muwisa Temple.
Water Resistance Evaluation of the Oils Coating for Conservation of Wooden Cultural Heritage
Na, Won Ju ; Cho, So Yeong ; Kim, Do Rae ; Chung, Woo Yang ;
Journal of Conservation Science, volume 31, issue 1, 2015, Pages 13~20
DOI : 10.12654/JCS.2015.31.1.02
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%.(Max. 9.6% with linseed oil).
A Study on the Characteristic and Manufacture Technique for the Gold wire of Phoenix-Shaped Glass Ewer by National Treasure No. 193
Hwang, Hyun Sung ; Yun, Eun Young ;
Journal of Conservation Science, volume 31, issue 1, 2015, Pages 21~27
DOI : 10.12654/JCS.2015.31.1.03
The Phoenix-shaped Glass Ewer, which is No. 193 National Treasure, was seriously damaged by a unique form of green glass pieces when excavated among a number of burial accessories of Hwangnamdaechong known to have been formed in the 5th century. While it has long been exhibited at the National Museum of Korea since its treatment for conservation treatment at conservation science laboratory in 1984, the existing adhesive materials seriously deteriorated for the 30 years, and the condition was quite unstable. The epoxy resin used as a restorative materials turned yellowing due to the light and heat so much that it was no longer able to exhibit it in a stable and effective manner. As a result, a re-treatment for conservation was conducted lately. This study focuses on the three pieces of Gold wires used to carefully wrap up the handle of the Phoenix-shaped Glass Ewer broken into three pieces, which has not been studied so far. As for the analysis method for Gold wires, SEM-EDS and Stereo Microscope were used for nondestructive analysis. First of all, the result of the SEM-EDS analysis shows that the composition was Au 91.9 wt.%-Au 92.8 w.t% and Ag 5.9 wt.%-Ag 6.5 wt.%, which indicates that it was an alloy made of Au and Ag. The production technique of Gold wires was also observed by means of optical microscopes. In general, Gold wires were manufactured by a drawing process in which a lump of gold was beaten or pulled out of a hole or by a process of twisting a gold plate. However, Gold wires separated from the handle of the Phoenix-shaped Glass Ewer did not involve any trace of twisting on the surface. Rather, fine vertical stripes were observed with the sections filled up. Hence, it is thought that this Ewer went through a drawing process and then was mended. As a result, no certain relation with the golden mending material used for the Phoenix-shaped Glass Ewer was verified. The findings above indicate that most of the existing researches on Gold wires recognized them, not as separate remains, but merely as a component of other golden remains. Thus, there has been little systematic study on the manufacturing techniques of Gold wires. The future study on Gold wires may verify the correlation between the Gold wires used to fix the handle of the Phoenix-shaped Glass Ewer, which is examined in this study, with that of golden remains in the Silla era.
Archaeomagnetic Dating of Baked Earth Samples of Samheung-ri Kilns in Gangjin Region
Sung, Hyong Mi ;
Journal of Conservation Science, volume 31, issue 1, 2015, Pages 29~35
DOI : 10.12654/JCS.2015.31.1.04
Investigation on relics was performed by dividing the site of Samheung-ri, Gangjin-gun, Jeonranam-do into six districts, A to F, and as a result, total 16 kilns including Celadon kilns and pottery kilns were found. Among them, total 9 kilns found from A D E F districts including 3 Celadon kilns, 6 pottery kilns, went through archaeomagnetic analysis with baked earth samples collected from them. Since those baked earth samples showed good baking conditions as well as high soil quality, it was possible to gain archaeomagnetic data with high reliability. Through archaeomagnetic analysis, it was possible to obtain archaeomagnetic dating for each of the 9 kilns corresponding to the period between A.D. 990~1250, and the results also correspond to archaeological dating estimated to fall under the period of Goryeo. Also, it was examined if there was any difference in the operational periods of the kilns by districts, and there was difference of periods from archaeomagnetic dating in the order of district D(A.D.1100)
A(A.D.1210). This result tells us that the kilns in district D stopped operating the earliest and were deserted, and next, those in districts E and F almost at the same time, and lastly, those in district A operated to the last and then were disposed.
Study on the Development and Properties of Ceramics Restoration Purpose Urethane resin with Excellent Reversibility
Oh, Seung Jun ; Park, Gi Jung ; Wi, Koang Chul ;
Journal of Conservation Science, volume 31, issue 1, 2015, Pages 37~46
DOI : 10.12654/JCS.2015.31.1.05
In the case of adhesives & restoration agents currently being used for the preservation treatment of ceramics and earthenware, epoxy type, cellulose type and cellulose type are mainly being used. However, they are showing various problems such as re-detachment from severe contraction, color change from yellowing, work inconvenience of staining on tools and hand during usage and irreversibility. For the purpose of solving the issues of yellowing and irreversibility of epoxy resin being used to restore ceramics, urethane synthetic resin with low yellowing excellent reversibility has been developed in this study. The adhesive strength of urethane resin that has been developed has excellent properties with 2.07MPa for undiluted solution, which is 1.5 times higher than that of existing material EPO-
1.21MPa. The result of workability measurement showed that the wear rate of urethane resin (in Talc 50wt%) was 1.09%, which was somewhat higher than that of existing material Quick
(1.02%). In addition, its wear rate is two times higher than that of
(0.39%), thereby showing an advantage in its forming process compared to existing materials. As for the advantage of urethane resin of reversibility experiment, 12 hours after acetone, ethyl alcohol deposition, urethane resin and filler talc were dissolved 100% while showing powdering phenomenon. Compared to 0% reversibility of existing epoxy resin, it has much superior reversibility. The result of UV rays experiment to evaluate its durability showed that
color change value based on undiluted solution of urethane resin was 2.76 before & after UV rays exposure, which was a decrease by about 7-20 times compared to that of existing resin, thereby minimizing the issue of heterogeneity.
Material Characteristics and Archaeological Scientific Implication of the Bronze Age Potteries from the Cheonan-Asan Area, Korea
Lee, Chan Hee ; Cho, Seon Yeong ; Eo, Eon Il ; Kim, Ran Hee ;
Journal of Conservation Science, volume 31, issue 1, 2015, Pages 47~64
DOI : 10.12654/JCS.2015.31.1.06
The excavated potteries and raw clays of the Bronze Age from the archaeological sites in the Cheonan-Asan area were studied on material scientific characteristics and homogeneity. Under the microscope, grainsize of the tempers in the potteries were distributed from less than 1mm to 10mm. Microtexture of the potteries showed various shapes and sizes of pores. In addition to the main minerals such as quartz, feldspar, mica, hornblende, chlorite and talc were found from the X-ray diffraction analysis of potteries, while talc was not found in the raw clay. Therefore, it was considered as an artificially added mineral. Firing temperature of the potteries, which did not contain chlorite, are assumed that they were baked below
. On the other hand, the potteries which had mica and talc, are assumed that they were fired below
. The geochemical characteristics of the potteries and raw clays showed very similar patterns, that means the potteries were produced by using the raw clay sources from each site.
The Material Analysis and a Study on the Conservation Treatment of Taejo's Portrait Mounting Decorative Knots in the National Palace Museum of Korea Collection
Lee, Seung Lee ; Wi, Koang Chul ;
Journal of Conservation Science, volume 31, issue 1, 2015, Pages 65~73
DOI : 10.12654/JCS.2015.31.1.07
The purposes of this study are helping the understanding on the Dae-hwe kind relics, verifying the deformation rate stability during conservation treatment and enhancing the conservation treatment work by investigating the status and analyzing the material of Taejo's portrait mounting decorative knots in the National Palace Museum of Korea collection. The result of material analysis on the decorative knots was that the outer threads are silk threads, inner threads are cotton threads, the width of the metal threads was
and the major component of it was 55wt% copper. The result of verification on the deformation rate during the form correction of the bell tassel was that it has been found as stable by having the deformation rate of 1 TPCM or less. The result of glue selection test to be used on the repairing of tassel cross-section with its thread cut was that wheat starch adhesive has been found most appropriate because it has the highest tensile strength at all concentrations. The conservation and treatment procedure was established based on above results of analysis and test on the relic and the conservation treatment work including packaging has been completed in accordance with the established procedure.
Study on the Conservation of Scale Armor Using Duplication Technique - Focused on the Case of the Conservation Treatment of the Excavated Artifact from Jinyoung 2-Area, Gimhae -
Kim, Dong Min ; Park, Jung Hyeok ; Cho, Hyun Kyung ; Cho, Nam Chul ;
Journal of Conservation Science, volume 31, issue 1, 2015, Pages 75~86
DOI : 10.12654/JCS.2015.31.1.08
A scale Armor is usually excavated in a scattered form weakened by corrosion after its burial. Therefore, they should be brought into the indoor in a safe environment for the on-site conservation treatment as it was excavated. They should be placed on a stable support with a reinforced base in the indoor treatment. In this process, the bottom surface which can not be observed after the conservation treatment is placed for a record by actual survey and photography. But this method had a limit on figuring out the whole aspects of the artifact. For compensating the defect, duplication of the artifact was considered as an alternative method for the previous two methods in the case of conservation of the scale Armor from Jinyoung 2-Area, Gimhae. Neck guard was excavated in a distorted form by the earth pressure, and was hard to recognize the original shape. However, whole real material of its original form was secured through the combination of each duplicated lamellae. Throughout the application of the duplication technique in the process of conservation of scale Armor and neck guard, it could secure the real material of the bottom surface and elevate the understanding of the artifact. Moreover, a constitution of the armor could be identified more effectively.