Abstract: This paper considers the use of carbon black toner granulation to develop the carbon-black seaisland ultra-fine filament to replace the technology of white sea-island ultra-fine filament. The production of suede with sea-island filament via environmental dyeing and finishing technology can greatly reduce the use of dyes, and the color fastness of the product is increased by 1 to 1.5. After the dyeing and finishing process, the carbon black toner can be recycled to reduce pollutant emissions, providing a direction for the sustainable development of suede.

Key words: sea-island ultra-fine filament; suede; carbon black toner; color fastness