An Improved Method for Steel-Facing Copper Etching Plates

The number of prints that can be made from acid or dry point etched copper plates can be substantially increased by electrodeposition of iron onto the surface of the plate. This process is traditionally, but incorrectly, known as steel facing. Using the Electroetch processor at 2 volts and with about 50 gm/l of aqueous sal ammoniac instead of at 6 volts with 225 gm/l gives excellent coating without the need for the operator having special skills.