Overview
ISO 9923:1994 - Micrographics - Transparent A6 microfiche - Image arrangements defines the characteristics and image layouts for transparent A6 microfiche intended for international interchange, micropublishing and archival use. The standard covers common uniform formats (49, 98, 270 and 420-frame arrangements) and a single-frame microfiche; an annex addresses additional uniform and variable division formats (30, 60, 63, 84, 208, 210, 325 frames and variable divisions of 2, 4, 8, 16, 32, 64). It consolidates source-document and COM (computer output microfiche) requirements into a single reference for consistent microfiche production and interchange.
Key topics and technical requirements
- Image arrangements and frame formats: Defines standard frame counts and grid layouts for 49, 98, 270, 420 and single-frame microfiche (and additional formats in Annex A) to ensure consistent indexing and retrieval.
- Heading and identification areas: Specifies heading layouts (identification, bibliographic and sequential areas), machine-readable positioning, and minimum character legibility (characters minimum height 1.6 mm).
- Physical film characteristics: Limits on film thickness (typically 0.10–0.22 mm), corner-cut and notch conventions to identify the sensitized side, allowable corner rounding, and curl/bow tolerance after conditioning (curl limit around 6.5 mm).
- Margins, microimage placement and orientation: Standard lower and side margins and rules for horizontal or vertical pagination and the starting frame position for indexing.
- Targets, indexing and cut marks: Requirements for technical targets (ISO test charts, reduction-ratio indication, density/reflectance patches), index placement, and cut-mark sizing/location for automated cutters (e.g., minimum 3 mm square cut mark positioned relative to a reference corner).
- Processing, storage and quality control: Guidance on processing effects (dimension variation, thermal processing effects), storage practices and controls for microimage quality and density; notes on COM microfiche are provided (Annex C).
Applications
ISO 9923 is used to:
- Ensure interoperable microfiche for international exchange and micropublishing.
- Standardize archival and library microforms for long-term preservation.
- Guide microfilming of source documents and computer output microfiche (COM) workflows.
- Provide layout standards for specialized uses such as cartography and large drawings (single-frame microfiche).
- Micrographics service providers and microfilm laboratories
- Libraries, archives and records managers
- Government agencies and legal/health record custodians
- Manufacturers of microfiche equipment and automated duplicators
- Organizations producing COM for high-volume document retention
Related standards
ISO 9923 references and complements other ISO micrographics and photographic standards (e.g., ISO 6196 series for vocabulary and quality, ISO 543/6148 for film dimensions and storage, ISO 446/3334 test charts, ISO 10602 for stability). Annexes A–C give additional format details, dimensional variation notes and COM guidance.
Keywords: ISO 9923, microfiche, A6 microfiche, micrographics, image arrangements, COM microfiche, microfilming, microimage, reduction ratio, microfiche indexing.
