Editing Mechanical pencil (section)

===Pigments===
Mechanical pencils with [[Coloured Pencil Leads|colored leads]] are less common, but do exist. [[Crayola]]'s "Twistable" product line includes two different types of colored pencils (erasable and non-erasable) with mechanical feed mechanisms, but does not offer refill leads. Several companies such as [[Pentel]], [[Pilot (pen company)|Pilot]], and [[Uni-ball]] (Mitsubishi Pencil Co.) currently manufacture colored refill leads in a limited range of diameters (0.5&nbsp;mm, 0.7&nbsp;mm, or 2&nbsp;mm) for their own products. [[Koh-i-Noor Hardtmuth|Koh-i-Noor]] makes mechanical colored pencils with replaceable leads in 2.0, 3.15 and 5.6&nbsp;mm sizes.<ref>[http://www.penciltalk.org/2009/07/koh-i-noor-2-0mm-leadholders-and-colour-leads Koh-I-Noor 2.0mm leadholders and colour leads]. pencil talk. Retrieved on 2011-10-14.</ref>