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  2. 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 ...

  3. Tilted Arc - Wikipedia

    en.wikipedia.org/wiki/Tilted_Arc

    Tilted Arc was a controversial public art installation by Richard Serra, displayed in Foley Federal Plaza in Manhattan from 1981 to 1989. It consisted of a 120-foot-long (37 m), 12-foot-high (3.7 m) solid, unfinished plate of rust-covered COR-TEN steel. Advocates characterized it as an important work by a well-known artist that transformed the ...

  4. Weathering steel - Wikipedia

    en.wikipedia.org/wiki/Weathering_steel

    Weathering steel, often referred to by the genericised trademark COR-TEN steel and sometimes written without the hyphen as corten steel, is a group of steel alloys which were developed to eliminate the need for painting by forming a stable external layer of rust. U.S. Steel (USS) holds the registered trademark on the name COR-TEN. [1]

  5. Tincture (heraldry) - Wikipedia

    en.wikipedia.org/wiki/Tincture_(heraldry)

    The first so-called "rule" of heraldry is the rule of tincture: metal should not be placed upon metal, nor colour upon colour, for the sake of contrast. The main duty of a heraldic device is to be recognized, and the dark colours or light metals are supposed to be too difficult to distinguish if they are placed on top of other dark or light ...

  6. Bluing (steel) - Wikipedia

    en.wikipedia.org/wiki/Bluing_(steel)

    Bluing, sometimes spelled as blueing, is a passivation process in which steel is partially protected against rust using a black oxide coating. It is named after the blue-black appearance of the resulting protective finish. Bluing involves an electrochemical conversion coating resulting from an oxidizing chemical reaction with iron on the ...

  7. Damascening - Wikipedia

    en.wikipedia.org/wiki/Damascening

    Damascening. Damascening is the art of inlaying different metals into one another—typically, gold or silver into a darkly oxidized steel background—to produce intricate patterns similar to niello. The English term comes from a perceived resemblance to the rich tapestry patterns of damask silk.