Etching
Step 5 of the PCE Process

Virtually all metals can be etched, although some are etched more readily than others. The vast majority of metals can be etched using a relatively innocuous etchant, an aqueous solution of ferric chloride. 

First, the metal is rinsed of the remaining photoresist that hasn't bonded to the metal. Then, etchants are applied to the metal in a conveyor machine. Durring this process, the non-bonded areas of metal are exposed to the etchants and begin to etch upon contact. 

Because etchants are applied to the entire sheet of metal at once, PCE maintains the unique ability to make every cut simultaneously, which can save countless hours for parts with complex geometries or features, and especially for fine meshes and screens.