A professional who operates mechanical or hydraulic press to mold fire-clay retorts or condensers used in smelting zinc ores. Respnsibilities include:

• Packs plastic mixture of fire-clay into mold of press and closes mold.
• Pulls lever to actuate ram which forces clay into all parts of mold.
• Removes molded retort or condenser from press.
• Places protective jacket around retort or condenser, and puts it into drying chamber for seasoning.