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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 ...
This object is from the collection of the Indiana State Museum. Conservation and restoration of ceramic objects is a process dedicated to the preservation and protection of objects of historical and personal value made from ceramic. Typically, this activity of conservation-restoration is undertaken by a conservator-restorer, especially when ...
Black-on-black ware is produced with a smooth surface, with the designs applied through selective burnishing or the application of refractory slip. The clay body used in this type of pottery has a very fine grain structure. Both types are typically made using traditional methods of hand-coiling local clay and firing it in a pit.
Kaolinite ( / ˈkeɪ.ələˌnaɪt, - lɪ -/ KAY-ə-lə-nyte, -lih-; also called kaolin) [ 5][ 6][ 7] is a clay mineral, with the chemical composition: Al 2 Si 2 O 5 ( OH) 4. It is a layered silicate mineral, with one tetrahedral sheet of silica ( SiO4) linked through oxygen atoms to one octahedral sheet of alumina ( AlO6 ).
Gray or blue. Soil in anaerobic, saturated environments may appear gray or blue in color due to the redox reduction and/or depletion of iron. In an anaerobic soils, microbes reduce iron from the ferric (Fe 3+) to the ferrous (Fe 2+) form. Manganese may also be reduced from the manganic (Mn 4+) to the manganous (Mn 2+) form, though iron ...
Antistatic agent. An antistatic agent is a compound used for treatment of materials or their surfaces in order to reduce or eliminate buildup of static electricity. Static charge may be generated by the triboelectric effect [ 1] or by a non-contact process using a high voltage power source. Static charge may be introduced on a surface as part ...
Wood preservation. In moist and oxygenated soil, there are few treatments that enable vulnerable wood (softwood here) to resist for long against bacterial or fungal degradation. Detail of sample in photo above. Wood easily degrades without sufficient preservation. Apart from structural wood preservation measures, there are a number of different ...
Ochre. Ochre ( / ˈoʊkər / OH-kər; from Ancient Greek ὤχρα (ṓkhra), from ὠχρός (ōkhrós) 'pale'), iron ochre, or ocher in American English, is a natural clay earth pigment, a mixture of ferric oxide and varying amounts of clay and sand. [ 1] It ranges in colour from yellow to deep orange or brown. It is also the name of the ...
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