The magic of botanical dyes Who would have thought that Polygonum tinctorium (whose root is known as banlangen, and is used in traditional Chinese remedies), could also work magic on fabric? During a visit to designer Chu Yan's studio, Belarusian host Kate witnessed an enchanting transformation, as Chinese herbs were reborn as brilliant dyes. When a piece of silk shifted before her eyes, from lush green to sky blue in a matter of seconds, Kate could only marvel: "It's like Chinese sorcery!" As C

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