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2. Stanhope (optical bijou) - Wikipedia

   en.wikipedia.org/wiki/Stanhope_(optical_bijou)

   A stanhope featuring the city of Ilmenau, Germany with the photographs contained inside it. A stanhope or stanho-scope is an optical device that enables the viewing of microphotographs without using a microscope.

3. Wolverine pendant of Les Eyzies - Wikipedia

   en.wikipedia.org/wiki/Wolverine_pendant_of_Les...

   The pendant has an engraving of a wolverine featuring a distinctive bear-like face, pointed nose, small ears, heavy body and hairy paws. It appears to be walking to the left. There is a diagonal line across the animal's shoulder which may be a spear. The pendant is broken and it is possible that the missing piece showed another figure. [1]

4. Engraving - Wikipedia

   en.wikipedia.org/wiki/Engraving

   Other terms often used for printed engravings are copper engraving, copper-plate engraving or line engraving. Steel engraving is the same technique, on steel or steel-faced plates, and was mostly used for banknotes, illustrations for books, magazines and reproductive prints, letterheads and similar uses from about 1790 to the early 20th century, when the technique became less popular, except ...

5. Photoengraving - Wikipedia

   en.wikipedia.org/wiki/Photoengraving

   A print made in 1907 from a photoengraved plate. It reproduces a sketch of Parga's castle made by Ludwig Salvator.. Photoengraving is a process that uses a light-sensitive photoresist applied to the surface to be engraved to create a mask that protects some areas during a subsequent operation which etches, dissolves, or otherwise removes some or all of the material from the unshielded areas of ...

6. Guilloché - Wikipedia

   en.wikipedia.org/wiki/Guilloché

   Guilloché (French:), or guilloche (/ ɡ ɪ ˈ l oʊ ʃ /), is a decorative technique in which a very precise, intricate and repetitive pattern is mechanically engraved into an underlying material via engine turning, which uses a machine of the same name. Engine turning machines may include the rose engine lathe and also the straight-line ...

7. Line engraving - Wikipedia

   en.wikipedia.org/wiki/Line_engraving

   An engraved plate from which visiting cards are printed is a good example of some elementary principles of engraving. It contains thin lines and thick ones, as well as a considerable variety of curves. An elaborate line engraving, if it is a pure line engraving and nothing else, will contain only these simple elements in different combinations.