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Tooth whitening or tooth bleaching is the process of lightening the colour of human teeth. [1] Whitening is often desirable when teeth become yellowed over time for a number of reasons, and can be achieved by changing the intrinsic or extrinsic colour of the tooth enamel . [ 2 ]
Blanqueamiento in Spanish, or branqueamento in Portuguese (both meaning whitening), is a social, political, and economic practice used in many post-colonial countries in the Americas and Oceania to "improve the race" (mejorar la raza) [1] towards a supposed ideal of whiteness. [2]
The history of skin whitening in East Asia dates to ancient times. To be light in an environment in which the sun was harsh implied wealth and nobility because those individuals were able to remain indoors while servants had to labor outside. [65] Ancient Asian cultures also associated light skin with feminine beauty.
Cloud whitening, a proposed solar radiation management climate engineering technique; Key whitening, increasing the security of a cryptographic cipher; Racial whitening, an ideology in Brazil 1889–1914 Blanqueamiento, the practice of marrying whiter people in order to have whiter offspring; Signal whitening, decorrelation in signal processing
Some sources state that Elizabeth I of England may have used Venetian ceruse. [1]Venetian ceruse or Venetian white, [2] also known as blanc de céruse de Venise [3] and Spirits of Saturn, [4] was a 16th-century cosmetic used as a skin whitener.
Whitening, or "tooth bleaching", is the most common cosmetic dental procedure.Whitening is a safe process that is effective for most patients. Multiple whitening options are available, including over the counter products such as Crest Whitestrips, as well as dentist-supervised methods such as in-office treatments or at-home treatments involving trays with a peroxide gel.
Following Japanese colonial rule in Taiwan (1895–1945), Taiwanese women were consumers of Japanese skin whitening products in the 20th century. Mainland China has also become a large market for bihaku products from companies like Shiseido, Shu Uemura and SK-II in the 21st century.
The term "bleach" originates from a French word signifying "to whiten." In essence, the process of bleaching involves whitening by removing substances that impart color to the material undergoing the bleaching treatment. [26] Bleaching is the process of decolorizing the material after it has been scoured.