Marker pen

A marker pen, fine liner, marking pen, felt-tip pen, flow marker, sign pen (in South Korea), vivid (in New Zealand), texta (in Australia), sketch pen (in South Asia) or koki (in South Africa), is a pen which has its own ink source and a tip made of porous, pressed fibers such as felt.[1] A marker pen consists of a container (glass, aluminum or plastic) and a core of an absorbent material... This filling serves as a carrier for the ink. The upper part of the marker contains the nib that was made in earlier times of a hard felt material, and a cap to prevent the marker from drying out.

The tip of a green felt-tip pen
A box of colored felt-tip pens (made by Caran d'Ache)
Marker pen

Until the early 1990s, the most common solvents that were used for the ink in permanent markers were toluene and xylene. These two substances are both harmful[citation needed] and characterized by a very strong smell. Today, the ink is usually made on the basis of alcohols (e.g. 1-Propanol, 1-butanol, diacetone alcohol and cresols).

Markers may be waterproof, dry-erase, wet-erase (e.g. transparency markers), or permanent.


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