Frames made from aluminum are lightweight and highly corrosion-resistant. Aluminum is used primarily by high-end eyewear designers because of the unique look it creates.
Aluminum is not only the world's most abundant, but also the most widely used, nonferrous material. Pure aluminum is actually soft and weak, but commercial aluminum with small amounts of silicon and iron is hard and strong.
Aluminum frames are rapidly expanding because they are three times as light as steel frames and twice as light as titanium watches, despite the relative thickness of the frames.
• They are water and air corrosion resistant and lend themselves well to galvanic treatments.
• Aluminum alloys (pure aluminum is too malleable) are warped like acetate, cut in plates, and are resistant to corrosion.
• Aluminum is back in eyeglasses manufacturing because it is as resistant as nickel silver and, in addition, extremely light. However, this material is used in alloys, which prevent it from being welded. To assemble the parts, the manufacturers have to use mechanical processes such as screwing, etc.
• Composition: 10% copper, 10% chromium, 80% aluminum.
Pros : Lightweight & lightness of the material, aesthetic colors, corrosion free. strong, holds an adjustment well. Durable.
Cons : No welding, particular galvanic treatment. Becomes brittle when exposed to very hot temperatures.
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