Our invention on brown pigment preparation process and application won the certificate of patent for invention (Patent No.: ZL 201210413804.5) which is granted by State Intellectual Property Office. Before this, we have got the following patents: (1) natural dyes and their dyeing method (Patent No.: ZL 201110282502.4); (2) natural dye extraction, separation and the dyeing application (Patent No.: ZL 201210017440.9) 

The invention refers to the preparation method and application of silkworm excrement. Pigment preparation method is simpleness, low cost, high extraction efficiency and high dye uptake. While dyeing on wool, silk, cotton and lined fabrics, it appears golden brown color with good color fastness and anti UV effect. Besides, it also has certain antibacterial properties. These comfortable and healthy products have broad market prospects.

This patented shows our strong technology on natural dye, which makes us more competitive among the textile industry.  We will continue to increase investment on science and technology innovation, creating more value for consumers.