tanning bleaching
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Sun tanning — describes a darkening of the skin (especially of fair skinned individuals) in a natural physiological response stimulated by exposure to ultraviolet (UV) radiation from sunshine or from artificial sources such as a tanning bed. With excessive… … Wikipedia
Human skin color — Skin pigmentation redirects here. For animal skin pigmentation, see Biological pigment. Variety of skin colors Human skin color is primarily due to the presence of melanin in the skin. Skin color ranges from almost black to white with a pinkish… … Wikipedia
Leather — For other uses, see Leather (disambiguation). Modern leather working tools Leather is a durable and flexible material created via the tanning of putrescible animal rawhide and skin, primarily cattlehide. It can be produced through different… … Wikipedia
Leather production processes — The leather manufacturing process is divided into 3 fundamental sub processes: preparatory stages, tanning and crusting. All true leathers will undergo these sub processes. A further sub process, surface coating can be added into the leather… … Wikipedia
coloration — colorational, adj. colorationally, adv. /kul euh ray sheuhn/, n. appearance with regard to color arrangement or use of colors; coloring: the bold coloration of some birds. [1605 15; COLOR + ATION] * * * ▪ biology Introduction in biology,… … Universalium
photochemical reaction — Chemical reaction initiated by absorption of energy in the form of visible (light), ultraviolet, or infrared radiation. Primary photochemical processes occur as an immediate result, and secondary processes may follow. The most important example… … Universalium
Hydrometer — Not to be confused with Hygrometer. Hydrometer from Practical Physics Schematic drawing of a hydrometer. The lower the densi … Wikipedia
Davy, Sir Humphry, Baronet — ▪ British chemist Introduction born Dec. 17, 1778, Penzance, Cornwall, Eng. died May 29, 1829, Geneva English chemist who discovered several chemical elements (including sodium and potassium) and compounds, invented the miner s safety lamp, and… … Universalium
Glasgow — GLASGOW, a city, the seat of a university, and a sea port, having separate jurisdiction, locally in the Lower ward of the county of Lanark, and situated in longitude 4° 15 51 (W.), and latitude 55° 52 10 (N.), 23 miles (E. by S.) from Greenock … A Topographical dictionary of Scotland
Physical attractiveness — … Wikipedia
Sodium chloride — NaCl redirects here. For the Google technology, see Google Native Client. This article is about the chemical compound. For sodium chloride in the diet, see Salt. For sodium chloride as a mineral, see Halite. Sodium chloride … Wikipedia
