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| yna@yna.co.kr 2022-08-30 11:41:23
▲This photo, provided by The National Research Institute of Cultural Heritage, shows the artificial inorganic pigments (PHOTO NOT FOR SALE) (Yonhap)
SEOUL, August 30 (Yonhap) -- The National Research Institute of Cultural Heritage (NRICH, Director General Kim Yeonsoo) under the Cultural Heritage Administration (CHA) announced on Tuesday that they had found a way to reproduce the artificial inorganic pigment "Dongrok" (copper green rust), used in producing the green color for Dancheong, through a traditional manufacturing technique.
With the reproduction of this, the supply of Dancheong, Gwaebul, portrait reparation, and original restoration work, which was scarce, will be back on pace.
An official from the National Research Institute of Cultural Heritage explained, "Dongrok will be utilized for different things, starting from Unhangak Hall of Hwaryeongjeon Shrine, Suwon, to more cultural heritage restoration and repair."
Anryo is a natural inorganic pigment to give color to things. It is a powder-type pigment that is resistant to water and oil.
Traditional Anryo is usually used to repair cultural heritage. Anryo is mixed with Agyo, a traditional adhesive or glue, to use it as a paint to color the faded parts of the heritage.
Traditional anryos are Dongrok, a green pigment, Heoicheong a blue pigment, Miltaseung a yellow pigment, Yeondan a red pigment and Yeonbaek a white pigment.
Heoicheong was usually imported. Miltaseung, Yeondan, and Yeonbaek had the traditional manufacturing technique. Dongrok was the only manufacturing method that had been cut off, and it was hard to restore it as there were not many documents or historical data.
National Research Institute of Cultural Heritage started the research to restore the ingredients of artificial inorganic pigment and the manufacturing method in 2019. The researchers went through Korea, China, and Japan's old documents to find out the designation of Dongrok and studied to restore the reproduction method.
As a result,it was confirmed that the color and ingredients were identical and the particle shape came out similar to that of Dongrok pigment when it was reproduced by the Yeombusikbeop, the salt corrosion method.
Yeombusikbeop is a traditional way to corrode "Dong-gi," a plate made out of copper or copper alloy, with light salt and NH4C. To put it in a simple way, the pigment is made by mixing powder from copper, natural salt, and urine in a certain ratio.
Lee Seon-myeong,a researcher from the National Research Institute of Cultural Heritage, said "Almost 100% of the traditional ingredients has been restored" and added "Traditional Dongrok was made more in an artificial way than in a natural way, but this proves that the level of skill was high."
By the end of this year, the National Research Institute of Cultural Heritage plans to publish research on the reproduction of Dongrok to the relevant academia. Disclose the research results in stages, apply for patents on manufacturing technology, transfer the skills applied, and publish a comprehensive report.
(This article is translated from Korean to English by Dowon Kim.)
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