... works of metal plate and workpieces, such as filter,TV shadow masks, Lead frames and etc. Photo Etching Machine(two chamber) How It ... etching machine suitable for high-quality etching works of metal plate and workpieces.2.Mainly used to engraving or etching through ... the metallic graphics such as meshes, filter,TV shadow masks, Lead frames, encoder disks, Grills, Grids, ...