Overview
SIST ISO 9958-1:1995 provides internationally recognized requirements and marking guidelines for draughting film with a polyester base, used as draughting media in technical drawings. The standard ensures consistency, durability, and suitability for processes such as duplication, revision, and storage of drawn or written information. It covers critical quality aspects, including physical properties, manufacturing criteria, and labeling requirements for draughting film, enhancing reliability in engineering, architectural, and technical documentation.
Key Topics
SIST ISO 9958-1:1995 covers a wide range of essential criteria for draughting film with a polyester base:
- Material Definition: Specifies bioriented polyester (polyethylene terephthalate) as the base film, with possible coatings for drawing surfaces.
- Thickness: Outlines how to state and label the film’s base and total thickness, ensuring clarity for users.
- Dimensional Stability: Sets requirements for thermal and hygroscopic expansion to maintain accuracy under temperature and humidity variations.
- Permanent Dimensional Change: Defines limits for permanent alterations in size after environmental exposure.
- Form Stability: Addresses resistance to curling and bulging, ensuring the film remains flat and functional.
- Adhesion: Specifies that coated layers must remain securely bonded under standard and adverse conditions, including exposure to water and ammonia.
- Surface Quality: Includes resistance to metal object marking, absence of visible fold marks, and surface resistance (including antistatic treatment).
- Visual Density: Defines acceptable transparency or opacity, important for copying and microfilming.
- Draughting Quality: Ensures compatibility with technical pens, mechanical pencils (ceramic and polymer leads), and ink, including performance after corrections.
- Labeling Requirements: Details mandatory labeling information for packaging to ensure product traceability and correct application.
Applications
Polyester-based draughting film meeting SIST ISO 9958-1:1995 is widely used in fields where high-precision technical drawings are essential. Practical applications include:
- Engineering Drawings: Supports CAD output, manual drafting, and archival-quality blueprints for mechanical, civil, and electrical engineering.
- Architectural Plans: Provides a stable, long-lasting medium for construction drawings and renovations.
- Technical Documentation: Used for technical graphics, process diagrams, and schematic documentation in industrial and manufacturing sectors.
- Duplication and Archiving: Ensures the original drawing can be repeatedly copied and reliably stored without degradation or dimensional change.
- Plotter and Automated Drawing Machines: The standard notes compatibility with numerically controlled draughting equipment.
- Quality Marking and Storage: Guidance ensures end products retain clarity, dimensional accuracy, and labeling for future reference and traceability.
Related Standards
To fully meet the requirements of SIST ISO 9958-1:1995, related standards support both the measurement methods and the broader system of technical documentation:
- ISO 9958-2: Draughting media for technical drawings – Draughting film with polyester base – Part 2: Determination of properties
- ISO 4593: Plastics – Film and sheeting – Determination of thickness by mechanical scanning
- ISO 9177-1 and ISO 9177-2: Mechanical pencils – Classification, dimensions, and requirements for leads used on draughting film
- ISO 216: Standard paper sizes (A and B series) for pre-cut draughting film sheets
- ISO 5457: Technical drawings – Sizes and layout of drawing sheets
By adhering to SIST ISO 9958-1:1995, manufacturers, suppliers, and users ensure consistency in draughting media, foster international compatibility, and improve the reliability and archival quality of technical drawings.
