I traveled Oaxaca to Huatulco, Mexico. Observed fresh leaf indigo dyeing, natural dyeing, and rare purple shell dyeing. (Akemi Nakano Cohn)
Mexcan woman (weaver) cut and chopped fresh indigo leaves (different Japanese indigo), then kneed really well to get the juice onto yarn(cotton). Left it couple hours, washed. Green color turns to blue.
Purple sea shells are now restricted because not enough resource. It comes from the juice from the shell like a snail. After the juice was taken by the licenced expert, he put shell back to the ocean. It saves to grow. It is the same as indigo dyeing, oxdize through the air to change the color.
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