indigo wax inkstick
A solid stick of indigo dye mixed with wax, used like an inkstick for drawing or dyeing. Also called 藍蝋 (あいろう).
See also: 藍蝋
I ground the indigo wax inkstick and drew patterns on the cloth.
Compound of 藍 (あい, 'indigo') and 墨 (すみ, 'inkstick'), referring to an inkstick-like form of indigo dye.