青黛

NamingQing Dai (Indigo Naturalis)——Yao Xing Lun (Treatise on Herb Property)The Processing of Qing Dai OriginA kind of dried powder or clumping processed from the leaf or stem with leaf of Baphicacanthus cusia (Nees) Bremek, Polygonum tinctorium Ait or Isatis indigotica Fort. of family Acanthaceae.Lo

NamingQing Dai (Indigo Naturalis)——Yao Xing Lun (Treatise on Herb Property)The Processing of Indigo NaturalisOriginA kind of dried powder or clumping processed from the leaf or stem with leaf of Baphicacanthus cusia (Nees) Bremek, Polygonum tinctorium Ait or Isatis indigotica Fort. of family Acantha