indigo-dyed paper; indigo paper
Traditional Japanese paper dyed with indigo (藍). Used historically for documents, book covers, and crafts.
spiderwort-dyed paper
Paper dyed using the blue pigment from spiderwort (青花紙, ツユクサ). A specific traditional dyeing method; see also 青花紙.
See also: 青花紙
An old ledger made of indigo-dyed paper is on display at the museum.
Some 藍紙 is dyed with pigment from the spiderwort plant.
Compound of 藍 (ai, 'indigo') and 紙 (kami, 'paper'), with rendaku voicing of 紙 to がみ. The term historically covers paper dyed with indigo or, by extension, spiderwort blue.