page_title: Technical pen
hierarchical_section_title: Technical pen
caption_attribution_description: English: Rotring Isograph 0.7 mm tip with scale
context_page_description: 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.
context_section_description: 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 (Isograph version) or a replaceable ink cartridge.
caption: Macro image of a 0.7 mm Rotring Rapidograph nib showing the flow control wire
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