high birefringence nematic LCs 15 years of PDLC liquid crystal production experience. Qingdao QY Liquid Crystal Co., Ltd. is a professional manufacturer of liquid crystal material and Nematic liquid crystal in China, especially for PDLC materials. liquid crystal Mixture QYPDLC-HD047-02 Lower Operating Temperature Tkn(C) -15 Upper Operating Temperature Tni(C) 102 Birefringence(589nm,20C) 0.28 Ordinary Refractive Index (No)(589nm,20C) 1.523 Electrical properties V90(VAC),0,20(V) 1.57 Electrical properties V10(VAC),0,20(V) 2.38 Viscosity(mPa.s,20C) 61