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Technical pen

3:59

Artist Problems - Technical Pens: Friend or Foe?

2:44

Rapidograph Technical Pens

3:44

Isomars Technoart Isograph Technical Pens I Affordable Pen For Artists & Review + Rotring I J.Sheetz

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Isomars Technoart Technical Drafting Pens

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Basics of Technical Pens - Part 3: Colored Inks

A technical pen is a specialized instrument used by an engineer, architect, or drafter to make lines of constant width for architectural, engineering, or technical drawings. "Rapidograph" is a trademarked name for one type of technical pen. Technical pens use either a refillable ink reservoir or a replaceable ink cartridge.
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