The dye used for printing the blue calico is the indigotin exacted from the bluegrasses, with clear and bright color as well as high environment-protection efficiency.

• 蓝印花布一般可分为蓝地白花和白地蓝花两种形式。蓝地白花布只需用一块花版印花，构成纹样的斑点互不连接，例如：梅、兰、竹、菊。