... .alibaba.comWeihui Yuxing Printing Equipment Co., Ltd. is located in the industrial zone of Houhe town, Weihui City, Henan ... facility. Weihui Yuxing Printing Equipment Co., Ltd mainly specialized in manufacturing positive PS plate, CTCP plate and CTP plate. ... who is doing experiments . 3.Operational Instructions:1)Exposure:In practice,the correct exposure time may vary according to the light ...