We're also doing metallic research and materials research to help us understand how to make materials on Earth better, but also to find out what materials are better for long-duration missions and traveling beyond Earth's orbit.

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The extensive use of metallic finishes and soft touch materials throughout reinforces the premium quality of the environment.

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The category of other materials, which includes all non-metallic finishes, saw volumes rise to nearly 8 million units (up 18.8 percent).

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Both materials are available in 16 different color cartridges including new glow in the dark green and blue and metallic silver colors.

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