Engine Turning refers to a fine geometric pattern that can be inscribed onto metal as a finish. Aluminium is often the metal chosen but any metal can be finely machined to produce intricate repetitve patterns that offer reflective interest and fine detail. Table of Geometry, from the 1728 Cyclopaedia. ... Inscriptions are words or letters written, engraved, painted, or otherwise traced on a surface and can appear in contexts both small and monumental. ... Hot metal work from a blacksmith Look up Metal in Wiktionary, the free dictionary. ... This article or section contains information that has not been verified and thus might not be reliable. ... Manufacturing is the transformation of raw materials into finished goods for sale, by means of tools and a processing medium, and including all intermediate processes involving the production or finishing of component parts (semi-manufactures). It is a large branch of industry and of secondary production. ... A pattern is a form, template, or model (or, more abstractly, a set of rules) which can be used to make or to generate things or parts of a thing, especially if the things that are generated have enough in common for the underlying pattern to be inferred or discerned...

Engravings produced by engine turning are often incorporated into the design of bank notes and other high value documents to make production of forged copies difficult. The resulting graphics are called Guilloches. A £20 Ulster Bank banknote. ... The examples and perspective in this article or section may not represent a worldwide view. ... A Guilloché or engine turning pattern is an ornamental pattern formed of two or more curved bands that interlace to repeat a circular design, most commonly seen on banknotes. ...