• Title/Summary/Keyword: Lacquer and Charcoal

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Synthesis of Application on the Product Design for the Shielding of the Electromagnetic wave in the Electrical Appliances (전자 기기의 유해 전자파 차폐를 위한 친환경 제품 디자인 활용도 분석)

  • Sung, Nak-Bong
    • The Journal of the Korea Contents Association
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    • v.11 no.9
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    • pp.129-136
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    • 2011
  • In this paper, the shielding material for the product design of various electrical appliances is suggested by more environmentally materials like as the lacquer and the charcoal. The suggested shielding material has the shielding effectiveness of 97.2%, 98.7%, and 96.3% at 900 MHz, 1.8 GHz, and 2.45 GHz, respectively. In the microwave oven and the cell phone, the metal or metal-coated plastic are used for the shielding of strong electromagnetic wave. However, by using more environmentally materials like as the lacquer and the charcoal, the products can be manufactured more light weighting, more heat-resisting, more abrasion resisting, and more corrosion resisting. Also, the products design can be varied more mellow and more friendly.

Application of the Eco-friendly Materials for the Interior Design (친환경 실내 디자인 소재 개발 활용 방안)

  • Sung, Nak-Bong
    • The Journal of the Korea Contents Association
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    • v.11 no.10
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    • pp.209-216
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    • 2011
  • This paper, the shielding material is suggested using by the korean paper, lacquer, and charcoal those can be used more eco-friendly materials for the interior design. Also, it is designed the image-wall for improving of the electromagnetic shielding and the beauty. Suggested shielding material is manufactured with the thickness of 2 mm by the printing method of the lacquer and charcoal on the korean paper. This material has the shielding effectiveness over 95% until 2 GHz. The application for the interior design using more eco-friendly material can be reduced the effect of electromagnetic wave and the chemical substances like as the formaldehyde and the volatile organic compound (VOC).

The Characteristics of Lacquer Coating of Mother-of-Pearl Turtle Shell Lacquerware (나전대모칠기에 나타나는 칠도막의 특성)

  • Lee, Seon Joo;Okada, Fumio
    • Journal of Conservation Science
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    • v.32 no.2
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    • pp.109-121
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    • 2016
  • Mother-of-pearl turtle shell lacquerware refers to a decoration made of a mother-of-pearl, a turtle shell and metal wires. This lacquerware features bright color tone as it is produced by sprinkling metal powder over its entire surface. This study aimed to find out its material properties and characteristics by using an optical microscopy and conducting a SEM-EDS analysis on the cross section of lacquer coating. As a result, it was found that charcoal powder and soil powder were mixed for undercoating. Then a mixture of cinnabar lacquer and monoclinic arsenic sulfide mineral ($As_2S_3$) was coated on the undercoating and brass powder was sprinkled on top of it. Especially, a little amount of pigment was found on the lacquer layer, which is distinguished from the colors used for conventional lacquer patterns. In addition, it was also found that the cinnabar lacquer and monoclinic arsenic sulfide mineral were mixed together.

Lacquer Layers and Making Methods of the Wooden Coffin Excavated from the Nongso Tomb of Unrimri, Sunchang in Korea (순창 운림리 농소고분 출토 목관 칠 분석을 통한 제작방법 연구)

  • Lee, Hye Youn
    • Journal of Conservation Science
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    • v.33 no.5
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    • pp.355-362
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    • 2017
  • The Nongso tomb of Sunchang was built in a relatively deep place; hence there was little damage from grave robbers. The tomb was completely filled with a large amount of charcoal, and therefore the wooden coffin was excavated in relatively good condition. On the basis of the structure of the tombs, excavated artifacts, and radiocarbon dating results, the tomb is estimated to be from between the late Goryeo and the early Joseon period. The wooden coffin excavated is double-layered structures consisting of an outer coffin and an inner coffin. The outside of the wooden coffin is thickly lacquered and decorated with yellow letters and white motifs. An analysis of the pigments' components revealed that the major component of the letters was gold (Au) and the major component of the motifs was silver (Ag). The coffin lacquer had three layers: a pigment layer, a yellowish-brown layer, and a black layer. The wooden bases of the coffins were painted with a black substance, such as soot, as mineral elements were not detected in the black layer. The yellowish-brown layer is presumed to be refined lacquer. From the analysis of the structure of the layers and pigments, we can estimate the method was adopted for making lacquer for wooden coffin. It is assumed that the method used gold leaf and gold powder. The form of the pigment and the internal structure are likely to be gold leaf, but the shape of the surface letters appears to have been formed using gold powder. This study will serve as important information for understanding lacquer making techniques at the time of the tombs' construction by confirming the making method through reproduction experiments using gold leaf and gold powder.

A Study on Conservation Materials of the Lacquer Wares : the Tohoe and Goksu (칠기 하지층 충진제의 특성 비교 : 토회와 곡수)

  • Jang, Eun Jeong;Park, Jung Hae;Kim, Soo Chul
    • Journal of Conservation Science
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    • v.31 no.2
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    • pp.125-130
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    • 2015
  • Specific techniques and materials in conservation of traditional lacquer has not been transmitted. This study aims to compare the basic characteristics of the filler which used in the base layer of lacquer conservation. Tohoe(a mixture of lacquer and Clay) and the three kinds of additives which is mixed with Tohoe and Goksu(a mixture of lacquer, wood powder and rice starch) are estimated in drying rate, impact resistance, abrasion. Among those samples, the more amount of clay causes fast dryness speed and worse cracks on the surface. The impact resistance is weakened at high amount of clay. There is no significant differences of impact resistance between both additives that is mixed with the samples and additives. The samples that are mixed with Goksu and additives show high impact resistance. In the polishing test, the more amount of filling powders show higher grinding degree and the sample that are mixed with wood powder and charcoal show higher degree as well. The highest grinding degree is Maekchil and Goksu but the lowest one is the sample of the rooftile powder mixture.

Study on Applying Techniques of Wooden Lacquerware Artifacts Excavated from Imdang-dong Site, Gyeongsan, Korea (경산 임당 유적 출토 칠기유물의 칠기법 연구)

  • Lee, Kwang-Hee;Han, Gyu-Seong
    • Journal of Conservation Science
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    • v.33 no.2
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    • pp.61-73
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    • 2017
  • In order to identify the application techniques of wooden lacquerware artifacts, optical/polarized light microscopy, Fourier transform infrared (FT-IR) spectroscopy, and scanning electron microscopy (SEM) equipped with energy dispersive X-ray analysis (EDX) were conducted on the lacquer films of 61 wooden lacquerware artifacts excavated from the Imdang-dong site, Gyeongsan, Korea. Powdered soil, soot, and charcoal were used as a filler for the undercoat, and iron oxide ($Fe_2O_3$) was used as a red pigment. Five different applying techniques were identified for the undercoat according to the composition of the lacquer. Eight different application techniques were identified for the final coat (on the middle layer and surface layer). Totally seventeen application techniques were identified based on the combination methods of the undercoat and finalcoat. Consequently, the undercoating techniques of Imdang-dong lacquerwares were found to be similar to those of lacquerwares from excavated in other provinces. However, the use of iron oxide as a red pigment at Gyeongsang province is very characteristic compared with others.