The long carbon mask is made of long carbon film. According to historical records, Beichang charcoal was spread from China (emperor charcoal) to Korea, then from Korea to Japan.
In 1972, in the Mawangdui tomb found in Hunan Province, China, although the body of Xin Zhui, dressed in noble clothes, had been buried underground for more than 2000 years, it was neither rotten nor mummified, and remained in the condition of four days after death. Japanese researchers believe that the secret is related to the five tons of charcoal placed around them, and carry out in-depth research on the preparation of long charcoal exhibition.
Baidu Encyclopedia explained: the preparation of long carbon originated in Japan's Yuanlu years of the kiyi Peninsula, Wakayama, Baibin area, the use of charcoal for mahogany stout wood, charcoal hard, high density, carbon content up to 93% ~ 96%.