Huiquan Chemical has accumulated more than 20 years�experiences in producing & developing optical brighteners. Our optical brighteners have enjoyed a good reputation for their superior quality for years. In Huiquan Chemical, there are many advanced equipments, such as sodium filter membrane treatment system, spray prill dry system, rotation evaporation dry system, and other instruments for research and inspection. We have established long term cooperation with many universities and chemical research institutions. Huiquan Chemical has got ISO9001:2000 certification in 2002. It is one of creditable companies in Tianjin city. Our Company keeps to the principles of �uper-quality Products, Scientific Management, Satisfactory Service, Continuous Improvement�as quality target, and �irst Class, Innovation & Harmony�as management principle.