Aluminum strips​ used for cosmetic caps offer excellent formability and a natural silver sheen. Common grades include 8011 and 1070 aluminum strips, typically ranging in thickness from 0.17mm to 0.5mm.

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3105 aluminum alloy, as an aluminum material with excellent corrosion resistance and medium-to-high strength, shows excellent formability and mechanical properties after being processed in H14 or H16 state, making it an ideal choice for screw cap material

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