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Moreover, the choice of facing sand may vary depending on the type of metal being cast and the specific requirements of the casting process. Finding the optimal type and composition of facing sand involves ongoing research and development to ensure that it meets the evolving demands of the industry.

Surface finish refers to the texture and quality of a surface as a result of the manufacturing process. In green sand casting, the surface finish is influenced by various factors including the quality of the sand mix, the mold-making process, and the casting technique itself. A smooth surface finish is often desired to reduce further machining processes post-casting, enhance aesthetic appeal, and improve the mechanical properties of the component.