Itadori (Japanese knotweed) - right (317 R)

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Uemura 09-10-2009 317.jpg

Museum number 317
Uemura number / title ; "Haze-some 25"
Folder location 4th shelf
Sample location right (317 R)
Fiber type silk
Color brown (slightly yellowish)
Dyestuff (Japanese common name) 虎杖 : Itadori
Dyestuff (English common name) Japanese knotweed
Dyestuff (botanical name) Fallopia japonica (Houtt.) Ronse Decr. var. japonica (Polygonum cuspidatum Siebold et Zucc.)
Plant part root / dried (?)
Dyestuff extraction boiled in water
Auxiliary agent in dye bath -
Mordant -
Other auxiliary agent -
Uemura's notes The concentration of the dye bath was high. The resultant color did not become red. Dyeing with its leaves and stems would hardly produce any color.
Uemura's date -