When selecting metal candy molds, the material choice directly impacts heat distribution and product release. Food-grade Aluminum is the most popular choice due to its excellent thermal conductivity, ensuring even cooling of the sugar mass. For high-volume industrial production, Stainless Steel (304 or 316 grade) is preferred for its superior durability, corrosion resistance, and compatibility with automated depositing lines. Ensure the surface has a high-polish finish or food-grade non-stick coating (like PTFE) to facilitate easy demolding without damaging the candy's shape.