DOUBLE DRAGON CHEMICAL CO., LIMITED is biggest factory specialized in making indigo and sulphur black dyes in China. Our factory has advanced production technology and first-class technology, with an annual production capacity of 1800 tons. It is one of the top 500 chemical enterprises and top 20 dyestuff enterprises in China. Our products are mainly exported to India, Indonesia, Pakistan, Bangladesh, Mexico, Brazil, Vietnam, Peru, Chile and other countries. We have offices in Bangladesh, Pakistan.

Indigo blue .Our company produces indigo powder, indigo particles. This product is a reducing dye, specialized in denim dyeing, with good strength, durable wear resistance and bright color, making it irreplaceable by other dyes.

Sulphur black, sulphur dye. Black powder or fine grain. Slightly Soluble In Water. It dissolves in sodium sulfide solution into a black green leucorrhoea. Soluble in hot concentrated sulfuric acid is greenish blue, after dilution, black precipitate is formed. Mainly used for dyeing cotton textiles and fibrilia. sulphur black produced by us has plural grades (purity) to meet the needs of different products printing and dyeing for customers.