Overview
ISO 6199:2005 - Micrographics - Microfilming of documents on 16 mm and 35 mm silver‑gelatin type microfilm - Operating procedures defines practical, camera‑operator level procedures to produce microfilm with presentation and legibility suitable for human use and for scanner input. It covers methods for filming documents on 16 mm and 35 mm silver‑gelatin microfilm using rotary and planetary cameras, including image orientation, use of non‑image areas, identification coding and quality control. The standard explicitly excludes filming of technical drawings, maps/plans and newspapers (other ISO standards apply).
Key topics and technical requirements
- Raw‑stock film: Use film conforming to ISO 6148 and ISO 18906 (silver‑gelatin safety film).
- Formats & orientation: Defined frame sizes and preferred orientations for simplex, duplex and duo‑duplex formats on 16 mm and 35 mm roll microfilm.
- Frame dimensions & margins: Example limits include maximum image widths of 14.92 mm (16 mm film) and 33.00 mm (35 mm film); minimum side margins typically 0.50 mm (16 mm) and 0.97 mm (35 mm).
- Inter‑image gap: Minimum inter-image gap values are specified (e.g., 1.00 mm for 16 mm, 2.00 mm for 35 mm). This gap is important for edge detection during scanning.
- Frame numbering: Frame numbers must not appear inside the image area, be consistent in position, and not exceed 2 mm height on the film.
- Placement & centring: Microimages must be centrally placed across frame width, with at least 30% of each image in each half of the usable film width.
- Edge marker: For planetary cameras, a matt white bar may be used to define irregular document edges.
- Reduction ratio: Guidance on selecting reduction ratios so smallest alphanumeric characters remain legible on both reader screens and distribution hard copies.
- Procedures covered: Document prep, roll coding (see ISO 11962), leader/trailer, targets and archival test areas, retakes, splicing, winding, quality control and legal admissibility considerations.
- Scanning considerations: Guidance for producing microfilm optimized for scanner input (frame pitch, edge detection, density, resolution and skew control).
Applications and users
ISO 6199:2005 is used by:
- Archivists and records managers preparing archival microforms
- Micrographics technicians operating rotary and planetary cameras
- Libraries, government agencies, banks and managed‑records services converting paper records to microfilm for preservation or as scanning‑ready masters
- Organizations concerned with legal admissibility and consistent microfilm quality
Practical applications include long‑term preservation, space‑efficient records storage, creation of scanning masters and standardized production of distribution copies.
Related standards
- ISO 6148 - Micrographic films, spools and cores - Dimensions
- ISO 18906 - Photographic films - Safety film specifications
- ISO 11962 - Image mark (blip) and coding for roll microfilm
- ISO 3334, ISO 6200, ISO 10550/10594 - Resolution, density and camera test targets
- ISO/TR 10200 - Legal admissibility of microforms
Keywords: ISO 6199:2005, micrographics, microfilming, 16 mm, 35 mm, silver‑gelatin microfilm, rotary camera, planetary camera, reduction ratio, inter-image gap, frame numbering, scanning microfilm.
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