Tengujo or tengucho paper (典具帖紙, tenguchōshi) is a specialist Japanese paper. It is an extremely thin kōzo paper that is almost transparent. One of its uses is for archival conservation. It has also been used for lighting design.
The paper is produced in the Kochi prefecture of Japan by the company Hidaka Washi since 1949. The product is made with kozo (stems of mulberry trees), alkaline water and neri (a liquid from the tororo-aoi plant).
References
Mizumura, Megumi; Kubo, Takamasa; Moriki, Takao (April 2015). "Japanese paper: History, development and use in Western paper conservation" (PDF). icon.org.uk. Retrieved 2020-05-06. https://icon.org.uk/system/files/public/Publications/AandE15/4-ae15_mizumura_43-59.pdf ↩
Whang, Oliver (2020-05-05). "The Thinnest Paper in the World". The New York Times. ISSN 0362-4331. Retrieved 2020-05-06. https://www.nytimes.com/2020/05/05/science/the-thinnest-paper-in-the-world.html ↩
Yamada, Mio (2019-03-31). "Baku Sakashita: In light of good design". The Japan Times. Retrieved 2020-05-06. https://www.japantimes.co.jp/life/2019/03/31/style/baku-sakashita-light-good-design/ ↩
Whang, Oliver (2020-05-05). "The Thinnest Paper in the World". The New York Times. ISSN 0362-4331. Retrieved 2020-05-06. https://www.nytimes.com/2020/05/05/science/the-thinnest-paper-in-the-world.html ↩
Whang, Oliver (2020-05-05). "The Thinnest Paper in the World". The New York Times. ISSN 0362-4331. Retrieved 2020-05-06. https://www.nytimes.com/2020/05/05/science/the-thinnest-paper-in-the-world.html ↩