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Barro negro pottery ("black clay") is a style of pottery from Oaxaca, Mexico, distinguished by its color, sheen and unique designs. Oaxaca is one of few Mexican states which is characterized by the continuance of its ancestral crafts, which are still used in everyday life. [ 1] Barro negro is one of several pottery traditions in the state ...
Chernozem (from Russian: чернозём, romanized: chernozyom, IPA: [tɕɪrnɐˈzʲɵm]; "black ground"), [ 1][ 2] also called black soil, regur soil or black cotton soil, is a black-colored soil containing a high percentage of humus [ 3] (4% to 16%) and high percentages of phosphorus and ammonia compounds. [ 4] Chernozem is very fertile ...
Black-on-black ware is a 20th and 21st-century pottery tradition developed by Puebloan Native American ceramic artists in Northern New Mexico. Traditional reduction-fired blackware has been made for centuries by Pueblo artists and other artists around the world. Pueblo black-on-black ware of the past century is produced with a smooth surface ...
Tumbaga is an alloy composed mostly of gold and copper. It has a significantly lower melting point than gold or copper alone [citation needed]. It is harder than copper, but maintains malleability after being pounded. Tumbaga can be treated with a carboxylic acid, such as oxalic acid, to dissolve copper off the surface. What remains is a shiny ...
Black-glazed ware is a type of ancient Greek fine pottery. The modern term describes vessels covered with a shiny black slip . Black-glazed pottery was produced especially in the Classical and Hellenistic periods. During the reducing phase of the three-phase firing sintering of the iron-rich "clay paint" led to a shiny black glaze.
Chemical coloring of metals is the process of changing the color of metal surfaces with different chemical solutions. The chemical coloring of metals can be split into three types: electroplating – coating the metal surface with another metal using electrolysis. patination – chemically reacting the metal surface to form a colored oxide or salt.
Ceramic colorants are added to a glaze or a clay to create color. Carbonates and oxides of certain metals, characterize most colorants including the commonly used cobalt carbonate, cobalt oxide, chrome oxide, red iron oxide, and copper carbonate. These colorants can create a multitude of colors depending on other materials they interact with ...
Black oxide or blackening is a conversion coating for ferrous materials, stainless steel, copper and copper based alloys, zinc, powdered metals, and silver solder. [ 1] It is used to add mild corrosion resistance, for appearance, and to minimize light reflection. [ 2] To achieve maximal corrosion resistance the black oxide must be impregnated ...
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