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Highlighter
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{{Short description|Type of writing device}} {{For|the cosmetic product|Highlighter (cosmetics)}}{{More citations needed|date=January 2021}} A '''highlighter''', also called a '''fluorescent pen''', is a type of writing device used to bring attention to sections of text by marking them with a vivid, [[translucent]] colour.<ref>{{cite patent | inventor-last =Schmid | inventor-first = | inventor2-last = | inventor2-first =John L. | inventor3-last =Sperry | inventor3-first = Bill | publication-date = 12 May 2005 | issue-date = | title =Ink compositions for use in highlighter markers and associated methods | country-code =WO | description = | patent-number = 2005042654 }}</ref> A typical highlighter is [[fluorescent]] yellow, with the colour coming from [[pyranine]].<ref>{{Cite web|date=2015-01-22|title=The Chemistry of Highlighter Colours(mostly fluracent green)|url=https://www.compoundchem.com/2015/01/22/highlighters/|access-date=2021-02-26|website=Compound Interest|language=en-GB}}</ref> Different compounds, such as rhodamines ([[Rhodamine 6G|Rhodamine 6GD]], [[Rhodamine B]]) are used for other colours.<ref>{{cite web |url=http://www.compoundchem.com/wp-content/uploads/2015/01/The-Chemistry-of-Highlighter-Pen-Colours.png |format=PNG |title=The Chemistry of Highlighter Colours |last=Brunning |first=Andy |work=[[Compound Interest (website)|Compound Interest]] |date=2015-01-22 |access-date=2016-04-18 }}</ref>
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