Aigaeshi is a Japanese technique of dyeing different shades of blue. Between each dip the rice paste is washed off the stencil. The fabric is dried then more rice paste can be applied with another stencil. The fabric is dipped again in indigo. This technique can be repeated. With careful planning two or possibly three shades of blue can be obtained.
Dyed with one shade of blue
A second example dyed with two shades of blue.