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Fig. 4 | Journal of Ethnobiology and Ethnomedicine

Fig. 4

From: Identity blues: the ethnobotany of the indigo dyeing by Landian Yao (Iu Mien) in Yunnan, Southwest China

Fig. 4

The indigo paste production process. a Strobilanthes cusia leaves after 24 h of fermentation. b Removal of leaves using a net (called jiu in local name). c Oxygenation after adding lime water to reduce the pH. d Detail of wooden tool (dongzhong) used for oxygenation. e A half section of a gourd (Lagenaria siceraria) scoop used to take out indigo paste at the end of the process

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