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20 Types of dye materials are selected. Most of them are plants, including flowers, fruits and roots. Two are insects. Two types of mineral are used as mordants.


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Chinese: 虎杖

English: Japanese knotweed

Scientific Name:  Reynoutria japonica

Part: Wood

Category: Plant


Reynoutria japonica, also known as Japanese knotweed, is a perennial plant that is native to East Asia, including Japan, China, and Korea. It has since been introduced to many other parts of the world, including North America and Europe.


Japanese knotweed is a fast-growing plant that can reach heights of over 10 feet tall. It has large, broad leaves and produces small, white flowers in late summer or early fall. The plant spreads primarily through its underground rhizomes, which can grow up to 3 meters deep and 7 meters horizontally.


Japanese knotweed is considered an invasive species in many parts of the world, as it can grow rapidly and outcompete native vegetation. It is difficult to eradicate and can cause damage to buildings and infrastructure, as its roots can penetrate concrete and asphalt.


Despite its invasive nature, Japanese knotweed has been used for various purposes in traditional medicine. It is believed to have anti-inflammatory, antimicrobial, and antioxidant properties, and has been used to treat conditions such as digestive problems, skin disorders, and respiratory ailments. However, more research is needed to fully understand its potential health benefits.


虎杖,又名日本虎杖,是多年生植物,原產於東亞,包括日本、中國和韓國。 它還引進至世界許多其他地區,包括北美和歐洲。


虎杖生長迅速,高度可達 10 英尺以上。 它的葉子大而寬,會在夏末或初秋開出小而白的花。 這種植物主要通過其地下根莖傳播,地下根莖可以長到 3 米深和 7 米水平高。





 1.  Logwood

 2.  Lac bugs

 3.  Comfrey

 4.  Cochineal

 5.  Madder

 6.  Connected shell

 7.  Knotweed

 8.  Huai Mi

 9.  pomegranate peel

10. Wormwood

11. Reseda(Weld)

12. winter green

13. cork

14. onion skin

15. chestnut

16. coconut

17. Hanna

18. five companions

19. black bean coat

20. Viola



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