Etched cast aluminum bar. | |||
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Etched cast aluminum bar. This bar was cast from very high purity aluminum pellets in a mold made by drilling a hole in a graphite slab, then etched with diluted potassium hydroxide. It was cooled slowly to allow crystals inside to grow large, as you can see from the size of the textured patches: Each patch represents a boundary of a single crystal. Source: Juan Jimenez Contributor: Juan Jimenez Acquired: 2 December, 2007 Text Updated: 8 December, 2007 Price: Donated Size: 2.5" Purity: 99.9999% | |||
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