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Guilloché

An engraving technique in which a very precise intricate repetitive patterns or design is mechanically etched into an underlying material with very fine detail. Specifically, it involves a technique of engine turning, called guilloché in French after the French engineer “Guillot”, who invented a machine “that could scratch fine patterns and designs on metallic surfaces”. This improved upon the more time-consuming practice of making similar designs by hand, as it allowed for greater delicacy, precision, and closeness of the line, as well as allowing greater speed.

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