Silberline Manufacturing Co., Inc., the global supplier of effect pigments with its Corporate Headquarters in Tamaqua, announced that Dr. Sean Zhou recently joined the firm asProduct Development Manager forPlastics. Dr. Zhou holds a Ph.D. in Polymer Science and Engineering from the University of Akron, Ohio. He holds a Bachelor of Science Degree in Chemical Engineering, from the Anshan Institute of Iron and Steel Technology, Anshan, China. Dr. Zhou and his family currently reside in Collegeville.