A professional who supervises and coordinates activities of workers engaged in making and repairing cast iron molds used to produce bottles and other glass containers. Respnsibilities include:

• Refers to machine shop blueprints and specification charts in manual to determine maximum allowable dimensions for basic type container specified by customer.
• Studies bottle design designated by customer and estimates glass shrinkage to calculate loss in capacity due to design.
• Computes dimensional corrections for molds to retain designated glass distribution and bottle capacity.
• Examines bottles having such defects as improper glass distribution, ridges, and rough surfaces, to determine if defects are due to mold or faulty production equipment.
• Receives mold change orders, and issues instructions for delivery of molds to bottle-making machines.
• Performs other duties as described under supervisor master title.