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2. Sandblasting - Wikipedia

   en.wikipedia.org/wiki/Sandblasting

   Sandblasting, sometimes known as abrasive blasting, is the operation of forcibly propelling a stream of abrasive material against a surface under high pressure to smooth a rough surface, roughen a smooth surface, shape a surface or remove surface contaminants.

3. Lithic technology - Wikipedia

   en.wikipedia.org/wiki/Lithic_technology

   The earliest stone tools to date have been found at the site of Lomekwi 3 (LOM3) in Kenya and they have been dated to around 3.3 million years ago. [1] The archaeological record of lithic technology is divided into three major time periods: the Paleolithic (Old Stone Age), Mesolithic (Middle Stone Age), and Neolithic (New Stone Age).

4. Burin (lithic flake) - Wikipedia

   en.wikipedia.org/wiki/Burin_(lithic_flake)

   Burin from the Upper Paleolithic (Gravettian) (ca. 29,000–22,000 BP). In archaeology and the field of lithic reduction, a burin / ˈ b juː r ɪ n / (from the French burin, meaning "cold chisel" or modern engraving burin) is a type of stone tool, a handheld lithic flake with a chisel-like edge which prehistoric humans used for carving or finishing wood or bone tools or weapons, and sometimes ...

5. Burin (engraving) - Wikipedia

   en.wikipedia.org/wiki/Burin_(engraving)

   A burin diagram, showing the handle, shaft, cutting tip, and face. [1] The bend in the shaft is especially associated with wood engraving. [2]A burin (/ ˈ b j ʊər ɪ n, ˈ b ɜːr ɪ n / BUR(E)-in) is a steel cutting tool used in engraving, from the French burin (cold chisel).

6. Burr (edge) - Wikipedia

   en.wikipedia.org/wiki/Burr_(edge)

   Burrs are most commonly created by machining operations, such as grinding, drilling, milling, engraving or turning. It may be present in the form of a fine wire on the edge of a freshly sharpened tool or as a raised portion of a surface; this type of burr is commonly formed when a hammer strikes a surface. Deburring accounts for a significant ...

7. Prehistoric rock engravings of the Fontainebleau Forest

   en.wikipedia.org/wiki/Prehistoric_rock...

   A reenactment of the creation of such a work using stone tools of the type produced by the works’ creators shows that a single line etching with a length of 15 cm and a depth of 2 mm can be completed in less than 60 seconds and that the engraved grids of the type commonly found in the Fontainebleau Forest can be executed in between 5 and 15 ...