Job Description:

• 1) Makes wax pattern of ear and molds plastic impression of ear for use in hearing aids, using handtools, grinder, and polishing wheels: Forms red designing wax into shape of ear, using spatulas, brushes, and gas burner.

• 2) Mixes ingredients to make plaster and pours it over wax pattern to form plaster mold of ear.

• 3) Removes plaster mold from wax pattern.

• 4) Mixes ingredients to make plastic compound and pours it into plaster mold to form impression of ear.

• 5) Applies hot and cold water and air to mold to harden plastic liquid in cavity of mold.

• 6) Removes rough casting of ear from mold.

• 7) Grinds and polishes casting to obtain plastic ear impression, using electric grinder and polishing wheels.

• 8) Examines impression for blemishes, and places it in box for shipment.