Shanghai Yonglong Chem-Tech Co., Ltd

As the largest manf. of PNA in China, we provide goods with best quality and suitable price, and all our clients are satisfied with our goods.

acid dyes are used in fibre and leather etc. we produce various acid dyes, more require pls contact me without hesitate.

The black series of acid dyes is widely used, we manufactured large qty of acid dyes with best quality and suitable price as well.

the acid dyes is very hot in domestic market for the technology of our engineers. you can rest assured about its quality.

the blue series have been widely accepted by our clients, if you have any interest on the product or you need to check if we can manf. other kind of d