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Yett hanging in the main entrance of Blackness Castle, Scotland, showing attached bolts and pierced construction.Wrought in 1693. [1]A yett (from the Old English and Scots language word for "gate") [2] is a gate or grille of latticed wrought iron bars used for defensive purposes in castles and tower houses. [3]
The Porta Nigra (Latin for black gate), referred to by locals as Porta, is a large Roman city gate in Trier, Germany.It is a UNESCO World Heritage Site. [2]The name Porta Nigra originated in the Middle Ages due to the darkened colour of its stone; the original Roman name has not been preserved.
Powder coated bicycle frames and parts. The powder coating process was invented around 1945 by Daniel Gustin and received US Patent 2538562 in 1945. [4] This process coats an object electrostatically and then cures it with heat, creating a finish harder and tougher than conventional paint.
Black for iron See also: Black oxide Coat object with a very thin layer of linseed oil , then gradually heat it to 300–400 °C, repeat the procedure if necessary, this process can be used on any metal, which can be heated to the temperature mentioned (except lead, tin and its alloys).
Japanning is most often a heavy black lacquer, almost like enamel paint. Black is common, and japanning is often synonymous with black japanning. The European technique uses varnishes that have a resin base, similar to shellac, applied in heat-dried layers which are then polished, to give a smooth glossy finish. It can also come in reds, greens ...
View of a frame-maker's workshop, oil on canvas, circa 1900 The elaborate decoration on this frame may be made by adhering molded plaster pieces to the wood base.. A picture frame is a container that borders the perimeter of a picture, and is used for the protection, display, and visual appreciation of objects and imagery such as photographs, canvas paintings, drawings and prints, posters ...
Mars Black is an iron oxide pigment developed in the 20th century. Also known under the names of black iron oxide, magnetic oxide, Pigment Black 11, and ferrous ferric oxide (Fe 3 O 4 ), [ 1 ] it has no known health hazards [ 2 ] and is considered non-toxic, with an ASTM lightfastness rating of I.
All colours of Greek black-red vase painting are produced by the different concentrations of iron in the clay, and the different degrees to which that iron is oxidised during firing. Iron has the special feature of forming oxides of various colours, including grey Iron(II) oxide (FeO), red Iron(III) oxide (Fe 2 O 3 ), and deep black magnetite ...