Inner Mongolia's Erdos Group, a leading enterprise in China's cashmere textile industry, has overcome many difficulties applying the ancient "natural dyeing" technique to cashmere products.

The technique is successfully applied after more than a decade of technical exploration. It has reached national standards, making Erdos the only company in the industry to apply the technique in cashmere products successfully.

Erdos has addressed issues such as uneven coloring, rough finish, and color fade after washing when applying the "natural dyeing" technique to cashmere products.

Natural dyeing involves extracting color pigments from raw plant materials through grinding and impurity removal.

After diluting the prepared dye with water, it is applied to the cashmere and herbal pigments fuse, rotating and heating for an hour before removal, resulting in cashmere dyed in natural colors. This dyeing technique has a history of several thousand years in China.

"Because cashmere is a pure natural fiber, herbal dyes also come from nature, the entire product constitutes a biodegradability," said Zhang Heng, a dyeing and finishing technical researcher at the Erdos Resources Limited Technology Center.

"At present, we are also developing some localized plant dyes, including spirulina and sea buckthorn found in Ordos city," Zhang added.

"Currently, cashmere products made from natural dyes have been industrially applied in our brand '1980'," said Jin Yongle, manager of the new product research department at the Erdos Resources Group Technology Center.

Jin introduced that in the future, they are set to expand further the color spectrum of cashmere products made from natural dyes and conduct systematic research on color stability to provide more consumers with healthy and environmentally friendly natural dye cashmere products.