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Soot, also called lampblack or carbon black, is a dark powdery deposit of unburned fuel residues, usually composed mainly of amorphous carbon, that accumulates in chimneys and other surfaces exposed to smoke—especially from the combustion of carbon-rich organic fuels in the lack of sufficient oxygen.

Lampblack has been used as the black pigment in paints and inks since prehistoric times, and is still widely used e.g. in printing inks, toners for xerography and laser printers, and in chemical industryChemical industry includes those industries involved in the production of petrochemicals, agrochemicals, pharmaceuticals, polymers, paints, oleochemicals etc. Chemical processes are used, including chemical reactions to form new substances, separations ba. The black color of rubberThis article is about the material rubber, for other uses see Rubber (disambiguation Rubber is an elastic hydrocarbon polymer which occurs as a milky emulsion (known as latex) in the sap of a number of plants but can also be produced synthetically. The ma tireA tire ( US spelling) or tyre ( UK spelling) is a roughly toroidal piece of (usually) rubber placed on a wheel to cushion it. Tires generally have reinforcing threads in them; based on the orientation of the threads, they are classified as bias-ply/ crosss is due to the use of lampblack as an ingredient in their vulcanisation; this use accounts for around 85% of the carbon black market.

Lampblack is easily produced experimentally by passing some noncombustible surface, such as a tin can lid or glass, closely through a candleThis article is on the source of light. For other meanings see Candle (disambiguation A candle is a light source usually consisting of an internal wick which rises through the center of a column of solid fuel. Typically the fuel is a form of wax with para flame. Lampblack produced in this way is both one of the darkest and dullest substances known.

Lampblack is also used to coat aluminum foil that has been previously attached to a recording drum for use in a recording barographA barograph is a recording aneroid barometer. The aneroid cell, through a gear or lever train, drives a recording arm that has at its extreme end either a scribe or a pen. A scribe records on smoked foil while a pen records on paper. The recording materia or other instrument. In this case, the sooty smoke is produced by burning a small amount of camphorCamphor also known as 1,7,7-trimethyl-bicyclo(2,2,1)heptan-2-one, d camphor, d (+)-camphor, (+)-2-bornanone, d-2-bornanone, 1,7,7-Trimethylnorcamphor, 2-Camphanone, 2-camphonone, Bornan-2-one, or Caladryl has the chemical formula C H O. General Name Camph. After recording the image is fixed by spraying the surface with a clear lacquer.

Cigarette smoke contains soot, which clogs up the lungs, and damages them. This causes the lung tissue to be scarred, reducing its elasticity and thus its surface area. Therefore air gets trapped in the lung, as gaseous exchange is not as efficient. This condition is called emphysema, and can eventually cause death.

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