What is Bopp film and pet film,how to produce bopp holographic film and pet holographic film

Zhejiang Zhongjia Technology Co.,ltd.Holographic films are ideal in packaging industry for flexible packaging,offset print.holographic film are commonly used fo···

Hardware: five metals. In ancient times, it refers to five metals such as gold, silver, copper, iron and tin, which were artificially processed into metal objec···