ISO 9175-1:1988

Overview

ISO 9175-1:1988 specifies the definitions, dimensions, designation and marking for tubular tips used in hand-held technical pens with India ink on tracing paper. The objective is to ensure a consistent line thickness within permissible tolerances during common draughting operations - including tracing, writing and lettering - whether or not lettering guides or templates are used. This part covers dimensional and marking requirements; Part 2 (ISO 9175-2) addresses performance, test parameters and test conditions.

Key topics and technical requirements

• Definitions: Clear terminology for components such as tubular tip, tubular technical pen, reservoir, cartridge, and ink feed system to promote consistent product specification and testing.
• Dimensional specifications: Prescribed dimensions for tubular tips (stepped tube geometry, lengths and diameters) to achieve predetermined line thicknesses and tolerances. The standard references ISO 128 for line-thickness conventions.
• Designation and marking: Rules for marking nominal line thickness and color codes on tips or packaging to aid identification and interchangeability.
• Line thickness control: Requirements intended to deliver a mark of constant line thickness at defined generation rates and to provide protection against ink leakage.
• Special construction notes: The document notes that some very small tubular tip sizes may require tube reinforcement in specific tube sections to maintain performance and durability.

Applications

ISO 9175-1 is directly applicable to:

• Technical drawing and drafting on tracing paper (architectural, engineering and technical illustrations)
• Precise lettering, writing and tracing tasks requiring consistent line widths
• Product specification and supply for hand-held technical pens using India ink
• Manufacturing and quality assurance of pen tips to ensure interchangeability and predictable drawing behavior

Who should use this standard

• Manufacturers of technical pens, nibs and cartridges
• Quality control and compliance teams in stationery and drawing equipment firms
• Drafting professionals, technical illustrators and reprographic services specifying equipment
• Standards and procurement specialists creating purchasing specifications for drawing tools

Related standards

• ISO 9175-2 - Tubular tips for hand-held technical pens using India ink on tracing paper - Part 2: Performance, test parameters and test conditions
• ISO 120 - Technical drawings - General principles of presentation
• ISO 128 - Line conventions and lettering (referenced for line thickness conventions)

Keywords: ISO 9175-1, tubular tips, technical pens, India ink, tracing paper, line thickness, dimensions, designation, marking, drafting standards.