A professional who electroplates phonograph record matrices to form metal replicas of positive and negative recorded surfaces, and to form stamper used in pressing phonograph records. Respnsibilities include:

• Inserts silver-coated lacquer disk (original recording) in rubber masking ring to prevent plating of specified surfaces, such as edges of disk.
• Hangs disk in tanks containing plating solutions, such as nickel and copper or inserts disk over centering pin of automatic plating tanks to form negative metal master matrix of disk.
• Observes dials and gauges to ensure solutions and electric current flowing through solutions conform to specifications, and adjusts controls as required.
• Removes plated disk from tanks after specified time, removes masking ring, washes and dries disk, and routes disk to finishing department for stripping and finishing process by matrix worker.
• Washes master matrix after finishing process to prevent adhesion during subsequent plating processes.
• Plates master matrix to form mother matrix and plates mother to form stamper used on record presses, following prescribed plating procedures.
• May prepare and test plating solutions.