However, he added, after the summer winds down, gold prices could rally sharply, which has been the pattern for the metal since 2001, except for 2008.

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The objects themselves are plain and they're made out of rusty metal but together, what they do as a pattern, creates a warmth and romance.

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Nowadays AMSC starts by engraving a microscopic pattern onto a sheet of nickel-based metal, to align the crystals.

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"It gives you the ability to print very fine metal patterns that could be used in biosensors or security features where you need to print a pattern and pass an electrical current through it, " said Mr Bishop.

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Material for each color is deposited on the substrate through a fine metal mask, with one mask used for each color so that colors line up in a precise, very close pattern that, to the human eye, appears to create one pixel, or point of light.

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