Conservation treatment that involved filling the lifting parts of wooden cultural heritage is carried out by obtaining wood or wood powder of the same species and mixing it with synthetic resin or natural glue to charge the blank area. Various concentrations and mixing ratios of adhesives and additives are used, depending on the type and condition of the target. Accordingly, in this study, we determined the conditions of the filler suitable for conservation treatment of wooden sculptures with lifted or separated bark in the National Museum of Modern and Contemporary Art. The optimal filler conditions for each adhesive were selected based on drying speed, shrinkage and expansion rates, and physical deformation degree. Then, to verify their actual applicability, these fillers were applied to wood and exposed to high-humidity environment and their cross-sections were observed. The fillers showed stable application in the following order: animal glue, PVAc adhesive, acrylic adhesive. In conclusion, a 1:2 mixture of animal glue and wood powder is a suitable filler for conservation treatment of wooden sculpture with lifted bark. The results of this study suggest appropriate ways to stabilize the bark that was lifted or separated from a wooden sculpture, thus enabling the future conservation treatment of the artworks under similar conditions.
The cleaning in conservation treatment of cultural heritage is very important process. For the best conservation treatment of cultural heritage, except having a good detergency, the cleaning agent must be able to keep the heritage from the secondary deposition and re-soiling, damage and etc. In this paper, the dust (lichen, algae, dust, etc.) on the surface of stone made heritage was treated with some kinds of solvents and analyzed with FT-IR to develop a cleaning agent for stone made cultural heritage. And the cleaning ability to the dust and the corrosion ratio to the granite of the cleaning agent was investigated. Nonionic surfactants were good for treatment of stone-made cultural heritage. The reason is that nonionic surfactants are stable in acidic solution, and possess low reactivity with the compound of stone and low possibility to the second contamination, and build up the reactivities of acids and oxidants. A new cleaning agent composed with $H_2O_2/HF/NP-10$ shows a good cleaning ability for the conservation treatment of stone made cultural heritage.
Earthenware horn cups with horse head decorations were excavated from Tomb No. 7 of Bokcheon-dong, Dongraegu, Busan Metropolitan City. Made of earth in the shape of a horn, these cups are considered to have been used to drink alcohol or beverage. Large numbers of earthenware horn cups of various shapes were excavated from tombs located in the old territories of Silla and Gaya. A pair of earthenware horn cups were excavated from Tomb No. 7, and the two cups are almost identical in overall shapes and manufacturing techniques despite different sizes. Conservation treatment was carried out for the bigger one of the two horn cups this time. There are two cracks toward the horse head decorations around the mouth with missing parts observed. The chest of the horse touches the ground with one side decorating the horse head and the other side facing the conical mouth of the horn cup. It is in the U shape, striking a balance based on two legs attached behind. The surface of the horn cup was made with a potter's wheel, and the connection to the horse head has traces of cutting and trimming. The horse head is expressed realistically with its features including the ears, eyes, nose, and mouth well apprehended and its color is grey This study intended to investigate manufacturing techniques of the artifact by examining its internal structure through the condition survey in a non-destructive way. CT imaging was used to figure out its manufacturing techniques and to diagnose its condition, and accordingly the scientific conservation treatment was conducted to stabilize the artifact. The precise diagnosis on conservation condition found that there are two chips in the spout with their cracks extended. One of the chips is connected with separation added to the crack. The material which has been used for connection in the past was collected for the infrared spectroscopic analysis, which was identified to be nitrocellulose resin for the connection. Therefore, this conservation treatment focused on removing the old material and preventing the spread of cracks. Before conservation treatment, the condition survey and scientific examination for the artifact were carried out to secure data about the earthenware horn cup with horse head decorations(Treasure). Based on them, effective plans for its conservation treatment was sought for and then existing adhesive was safely removed, and restoration material was selected to take into account its reversibility. In addition, the conservation treatment according to optimal methodologies was conducted through the consultation meeting with experts.
As the kettle excavated from a site in Hwangnam-dong, Gyeongju was presumed to have been used as a melting crucible in a glass production workplace, we decided to prove its usage by scientific analysis. First, we performed conservation treatment to find the original status of the kettle, and then SEM-EDS and XRD analysis of the five corrosions created on the surface of the kettle. The fragment of the spout, which played a crucial role for the kettle to be considered as a melting crucible, was discovered during the conservation treatment. So the mouth rim of the kettle was restored to perfection. When we observed the microstructure of the metal sample, it was proved to be cast iron gradually cooled without heat treatment. In the corrosion products, the main components were Fe and O and other components such as P, Si, Ca, and S were found. The main compounds were quartz, vivianite, goetheite, akaganite, lepidocrocite, hematite, etc. Although these components were used as raw materials for making glass, these were found not in the melting status but mere raw materials. This can be an evidence to show these site where the kettle was excavated had been a glass production workplace. However, it is not sure that the kettle was used as a melting crucible. Moreover, if we consider the organic mold and sand clay accumulated in the well site when the kettle was excavated at first, we can see this as a formative factor of the corrosions of the kettle. Therefore, we concluded that the kettle is a typical cast iron and was not used as a melting crucible of glass.
Journal of the Korean Society of Clothing and Textiles
/
v.45
no.4
/
pp.573-585
/
2021
This paper describes the processes conducted in the analysis and conservation of suit worn by Yu Rim (1898-1961). The suit consists of a jacket and pants and is a typical Mao-style suit for independence activists; it is notable in that it was made of domestic wool. Inside the jacket, there is a machine embroidery of the name "Danju," a label of synthetic resin which reads "Daegu citizen's tailor's shop," and buttons engraved with "PUSAN SIN-HUNG." According to our textile analysis, the outer layer is composed of worsted wool while the lining is made from acetate. Damage to the garment from malodor and insects has been repaired, and the suit has been restored to its original shape by a conservation treatment that has reinforced the textiles. This conservation case can provide valuable research data on the preservation of modern and contemporary clothing. In addition, this study also attempts to estimate the date of suit worn by Yu Rim's production by comparing it with woolen suits produced around the same time and examining the clues associated with the relics. This is significant since it enhances the value of the cultural assets and provides detailed information on the historical transformation of domestic suits.
Lee, Tae Jong;Cho, Ha Jin;Chae, Seung A;Park, Hee Jeong;Kang, San Ha
Journal of Conservation Science
/
v.36
no.5
/
pp.339-350
/
2020
This study attempted to apply a hybrid technology that integrated mineral-based fillers and water-repellent agents to control the efflorescence that results from the use of inorganic binders, for the conservation treatment (surface finishing) of cultural heritage materials made up of stone. Herein, different types of mixing ratios of a filler (silica fume 3.4%) and a water repellent (silane-siloxane 1%) were selected for fabricating the inorganic binder, and it was determined that the ratio selected by weight is effective in controlling efflorescence substances. In addition, it was identified that the inorganic binder with the mixing ratio resulted in a higher compressive strength than the standard (20MPa), and the water permeability resistance was high with low water absorption. The result of ion elution from the bilder showed that a smaller number of ions was observed to affect the efflorescence (directly and indirectly) as compared to that of the control group, which was considered to be relatively stable.
An ox bone object was excavated from the wetland at the excavation site in Bogam-ri tumulus, Naju. It was only able to identify the full image of the shape. Bogam were deteriorated and cracked due to the soil pressure and the repeated cycle of freezing and melting. They were also fragmented in pieces and powdered. In situ, bones were dewatered, consolidated and wrapped together with surrounding soils not to lose the fragmented bone pieces. Unpacking was carried out in the conservation lab and the treatment was processed. Soils on the reverse were removed and then the surface was consolidated and reinforced. Then, soils on the excavated side was cleaned and the surface was consolidated. The object was placed in the produced storing box. When the ox bone object was excavated, it did not have its head and was in the shape of tieing all its legs up. This shows that the animal had been tied up during a ritual and then buried. During the treatment, the importance of the burial purpose and maintaining the shape at the time of excavation was considered. Therefore, the shape of the object at the time of excavation was maintained rather than dismantling all these fragile bones and finding the shape of an ox. This conservation of ox bone object shows that conservation treatment methods have to be vary depending on characters and conditions of objects. In addition, it is expecting that this writing could be the reference to bone and horn objects excavated in the future for the whole process from the excavation to the conservation treatment.
The stone cultural properties durability is the falling. So the conservation is easy relatively. But the conservation countermeasure of the stone cultural properties the environment pollution needed urgently as extreme. I will find out about the stone cultural properties Through the example of Restoration and conservation treatment about Bowonsabeobin-guksaboseungtap in the paper. Damage reasons of the stone cultural properties are a physical damage, a structural damage, a biology damage, a chemical damage and artificial damage. The moisture plays especially the role which damage is make the stone cultural properties. The stone cultural properties is damaged due to damage reasons. So we investigate the stone cultural properties and must remove damage reasons. Bowonsabeobin-guksaboseungtap is funerary stupa of buddhist monk with circleorientedoctagon in Geryeo Period. There is the open air. Parts of it were damaged by grave robbery in 2004. So restoration was begun in 2004.While restoring it, wrong arrangement on top of the monk-stupa was rearranged. After being arranged in right order, the middle of monk-stupa was fixed by setting up stainlesssteel shaft. A roof stone of stupa finial has cracks. So It was adhered with epoxy resin(L-30) and was washed with distilled water for pollution clearing. The stone cultural properties takes the influence of the environment pollution much because it stays at the fields. It is easy also to be robed. Therefore we must watch more with the concern.
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 $500{\sim}600{\mu}m$ 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.
This study was conducted to investigate the penetration of PEG for conservation treatment conditions of archaeological waterlogged wood. The weight percent gain was examined, depending on the solvent of PEG, concentration and treatment period and temperature of treatment solutions. The penetration of PEG in the cell lumina of treatment woods was observed by scanning electron microscope. The results showed that the type of solvents had no influence on PEG penetration. In the concentration of the PEG treatment solutions, the weight percent gains (WPGs) were increased with increase in concentration of PEG. In terms of the period of the soaking treatment, a maximum WPGs were obtained for only 20 days. There was no distinctive difference in the WPGs by difference the temperature of the treatment. In conclusion, in the conservation of small size of archaeological waterlogged wood, it is confirmed that optimal solvent type and treatment period of PEG are water and 20 days, respectively.
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