- Manufactures& importer/ exporter of dyes & chemicals, such as fluorescent dyes, optical brightener agent, fluorescent whitening dyes, dyestuff, textile auxiliary agent, auxiliary for pulp, chemical, textile industries, pulp( paper) industries, fluorescent whitening agent (O.B.A.) for textile and pulp ( paper) used, optical brightening agents, sunpeitin. ...www.kuanchuan.com