The hill tribes of Laos, Vietnam , Burma and Thailand originally migrated from China. There are 6 major tribes : Karen, Hmong (originally the Miao), the Yao, the Akha, the Lisu and the Lahu.
The Hmong carried with them their knowledge of batik craft, decorating their clothing today pretty much the same way as the Miao in south west China did since the Qin dynasty.
The Blue Hmong people of Laos draw symbols on hemp cloth, applying wax with the canting tool. The hemp is cultivated locally and has low environmental effect. Once the cloth has been covered in the wax, it is left to harden before dyeing in indigo, a natural dye.
The Black Hmong of Vietnam too decorate their fabric with the batik technique.