藍あい玉だま

noun

indigo ball; ball of fermented indigo leaves

Traditional Japanese dye material made from dried, ground, and fermented leaves of the dyer's knotweed (Polygonum tinctorium). Used in indigo dyeing.

• 藍あい玉だまを水みずに溶とかして染せん液えきを作つくる。

  Dissolve the indigo ball in water to make the dye solution.