National Geographic : 1953 Aug
iir © National Geographic Society 158 + Today, as for Centuries Past, Kano Craftsmen Dye Cloth and Skeins of Yarn in Earthen Vats Filled with Indigo These men make blue dye by mixing indigo with ashes, locust-bean flour, and water. The process leaves a chalklike residue used as acement coating for vats and houses (pages 152, 153). Though the dyers specialize in indigo, they sometimes brew a red color. Dyed fabrics dry inthe sun. + Indigo colors range from pale to darkest blue. Dyers control the shade by the length of time they soakthe cloth. Wicker covers shield unused pits.