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| ==Origin== | | ==Origin== |
− | [http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] ''steynen'', partly from Anglo-French ''desteindre'' to take away the [[color]] from & partly of Scandinavian origin; akin to Old Norse ''steina'' to paint | + | [https://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] ''steynen'', partly from Anglo-French ''desteindre'' to take away the [[color]] from & partly of Scandinavian origin; akin to Old Norse ''steina'' to paint |
− | *[http://en.wikipedia.org/wiki/14th_century 14th Century] | + | *[https://en.wikipedia.org/wiki/14th_century 14th Century] |
| ==Definitions== | | ==Definitions== |
| *1: to suffuse with [[color]] | | *1: to suffuse with [[color]] |
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| A secondary [[method]] of stain involves a [[chemical]] or [[molecular]] [[reaction]] between the material and the staining material. Many types of [[natural]] stains fall into this category. Finally, there can also be [[molecular]] [[attraction]] between the material and the staining material, involving being held in a covalent bond and showing the [[color]] of the bound substance. | | A secondary [[method]] of stain involves a [[chemical]] or [[molecular]] [[reaction]] between the material and the staining material. Many types of [[natural]] stains fall into this category. Finally, there can also be [[molecular]] [[attraction]] between the material and the staining material, involving being held in a covalent bond and showing the [[color]] of the bound substance. |
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− | Different types of material can be stained by different substances, and stain ''resistance'' is an important characteristic in [[modern]] [http://en.wikipedia.org/wiki/Textile_engineering textile engineering]. | + | Different types of material can be stained by different substances, and stain ''resistance'' is an important characteristic in [[modern]] [https://en.wikipedia.org/wiki/Textile_engineering textile engineering]. |
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| In many cases, stains can be affected by [[heat]] , and may become [[reactive]] enough to bond with the underlying material. [[Extreme]] heat, such as from ironing or dry cleaning, can cause a [[chemical]] [[reaction]] on an otherwise removable stain, turning it into a chemical compound that is impossible to remove. | | In many cases, stains can be affected by [[heat]] , and may become [[reactive]] enough to bond with the underlying material. [[Extreme]] heat, such as from ironing or dry cleaning, can cause a [[chemical]] [[reaction]] on an otherwise removable stain, turning it into a chemical compound that is impossible to remove. |
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− | Various laundry [[techniques]] exist to attempt to remove or minimize existing stains, and stain removers are an important type of [[chemical]] in [http://en.wikipedia.org/wiki/Laundry_detergent laundry detergents]. Some stand-alone stain removers also exist. | + | Various laundry [[techniques]] exist to attempt to remove or minimize existing stains, and stain removers are an important type of [[chemical]] in [https://en.wikipedia.org/wiki/Laundry_detergent laundry detergents]. Some stand-alone stain removers also exist. |
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| [[Category: Chemistry]] | | [[Category: Chemistry]] |
| [[Category: General Reference]] | | [[Category: General Reference]] |