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2. Highlighter - Wikipedia

   en.wikipedia.org/wiki/Highlighter

   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. [1] A typical highlighter is fluorescent yellow, with the color coming from pyranine. [2] Different compounds, such as rhodamines (Rhodamine 6GD, Rhodamine B) are used for other ...

3. UV marker - Wikipedia

   en.wikipedia.org/wiki/UV_Marker

   UV marker with UV led lamp. An ultraviolet (UV) marker is a pen whose marks are fluorescent but transparent; the marks can be seen only under an ultraviolet light. They are commonly used in security situations to identify belongings or to prevent the reproduction of unauthorized banknotes. UV pens can now be bought at some stationery shops to ...

4. Fluorescent tag - Wikipedia

   en.wikipedia.org/wiki/Fluorescent_tag

   S. cerevisiae septins revealed with fluorescent microscopy utilizing fluorescent labeling. In molecular biology and biotechnology, a fluorescent tag, also known as a fluorescent label or fluorescent probe, is a molecule that is attached chemically to aid in the detection of a biomolecule such as a protein, antibody, or amino acid.

5. Invisible ink - Wikipedia

   en.wikipedia.org/wiki/Invisible_ink

   Security marker pens or UV markers with fluorescent ink that glows when illuminated with a UV light is often used to invisibly mark valuable household items in case of burglary. There are specialty security maker pens formulated for writing on non-porous surfaces such as glass, plastic, metal, etc.

6. Marker pen - Wikipedia

   en.wikipedia.org/wiki/Marker_pen

   The tip of a green felt-tip pen A box of colored felt-tip pens Marker pen. A marker pen, fine liner, marking pen, felt-tip pen, felt pen, flow marker, sign pen (in South Korea), vivid (in New Zealand), flomaster (in East and South Slavic countries), texta (in Australia), sketch pen (in South Asia), koki (in South Africa) or simply marker is a pen which has its own ink source and a tip made of ...

7. List of pen types, brands and companies - Wikipedia

   en.wikipedia.org/wiki/List_of_pen_types,_brands...

   A pen is a handheld device used to apply ink to a surface, usually paper, for writing or drawing. [1] Additional types of specialized pens are used in specific types of applications and environments such as in artwork, electronics, digital scanning and spaceflight, and computing.