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stain
EntityQ2733470· pop 21· linked from 134 articles

thumb|From a copy of "Decorative Patterns of the Ancient world," by Sir Flinders Petrie.

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Stain
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Stains
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8 sections
Contents
  • Types
  • Formation
  • Properties
  • Removal
  • See also
  • References
  • Further reading
  • External links

thumb|From a copy of "Decorative Patterns of the Ancient world," by Sir Flinders Petrie.

A stain is a discoloration that can be clearly distinguished from the surface, material, or medium it is found upon. They are caused by the chemical or physical interaction of two dissimilar materials. Accidental staining may make materials appear used, degraded or permanently unclean. Intentional staining is used in biochemical research, and for artistic effect, such as in wood staining, rust staining and stained glass.

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