This process is repeated until a thick shell exists over the wax pattern. The tree is alternately dipped into a ceramic slurry and sprinkled with stucco material, and then allowed to dry. In investment casting a detailed wax pattern of the finished part is created and mounted onto a wax "tree" that includes the metal delivery system (gates and risers). These features often lead to significant cost savings in material, labor, and machining compared to other metal casting processes. Investment casting produces internal or external features, thin walls, and internal passageways to get to a near-net shape. Investment casting (also known as lost wax investment casting or precision investment casting) produces parts with fine detail and an excellent as-cast surface finish.
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