Electroforming process was developed from electroplating and any material that can be deposited electrochemically could be electroformed. As in electroplating metal ions are transferred from the positive anode to the cathode. In the case of electroforming the metal shell is removed from the cathode (mandrel usually of aluminum, stainless steel or glass). See graphic.

Used in applications requiring:- 
Good surface finish. 
Tight tolerances. 
Intricate detail. 
Waveguides.sieves, mesh, evaporation masks, pinhole apertures, electron microscope grids, ink jet orifice plates. cold shields, thermal shields, metal bellows, prostheses, reflectors, nose cones, museum reproductions, heat exchangers, interior design components, decorative ware, jewellery, trumpet bells, media props, trophies, encoders, aperture plates, slits, microcircuits, laser light guides, optical mold inserts, fuel lines, seamless belts, shaver, molds, plaques, Reticles, Resolution Targets, EDM electrodes, blades, CD molds etc