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Aluminum foil bags are produced by dry laminating aluminum with other high-barrier materials, leveraging aluminum's unique properties. Aluminum is lightweight, glossy, highly reflective, and offers excellent barrier properties—it is impermeable to gases and moisture, adapts well to temperature variations, maintains shape stability under high or low temperatures, provides strong light blockage, and preserves aroma effectively. As a result, aluminum foil bags deliver outstanding moisture resistance, barrier protection, light blocking, penetration resistance, and an aesthetically pleasing appearance.