Liaoning Liangang Pigment and Dyestuff Chemicals Co.,Ltd is national hi-tech enterprise to develop and produce perylene dyes,pigments and their intermediates.The company has developed more than 20 kinds of perylene red series of products successively relying on perfect infrastructural facilities advanced productive technics,safe means of detecting and independent system of R&D for many years.There were four items of method of preparation perylene pigments obtaining the national inventionpatents. Nine project products fill the emptiness inside. The production linesof 1,8-Naphthalic anhydride,3,4,9,10-Perylenetetracarboxylic dianhydride,C.I.pigment Red 123(C.l.71145) ,C.I.pigment Red 149 and C.I.pigment Red 179 already have developed becoming the largest productive base in China. The products are available in occident market,Southeast Asia and other countries. The company establish well-deserved business relationship with many domestic enterprises. Not only do the perylene-series products of the company has the absolute advantage in domestic market, but they enjoy great popularity in foreign market.The spirit of鈥渟urviving on quality,developing on technology,forging ahead on innovation and benefiting from management鈥漣s company's principle.