Overview - What ISO 18925:2013 covers
ISO 18925:2013, "Imaging materials - Optical disc media - Storage practices," defines extended‑term storage conditions and recommendations for preserving optical discs (CD, CD‑R, CD‑RW, DVD, MO, WORM and similar formats) used for audio, video, instrumentation and computer data. The standard addresses environmental limits, storage facilities and housings, enclosures, labelling, acclimatization, inspection and cleaning, and fire‑protective storage. It emphasizes that manufacturer instructions take precedence and that deviation from the recommendations will generally shorten disc life expectancy.
Key topics and technical requirements
- Extended‑term storage environment
- Relative humidity: maintain between 20% and 50% RH; cycling not greater than ±10% RH.
- Temperature: preferably below 23 °C; extended periods should not exceed 25 °C; peak ≤ 32 °C. Storage below −10 °C and below 10% RH is not recommended.
- Contaminants and gaseous impurities
- Minimize ammonia, chlorine, sulfides, peroxides, ozone, NOx, smoke and acidic gases. Use best available filtration and consider molecular sieves for pollutant and humidity control.
- Magnetic fields
- Relevant primarily to magneto‑optical (MO) discs.
- Materials, enclosures and storage housing
- Recommendations for protective sleeves, boxes, labelling, shelving, and insulated record containers; options to control conditions either at the room level or within individual housings.
- Preparation and acclimatization
- Guidance on conditioning discs before storage and on managing temperature/humidity transitions to avoid condensation (Annexes cover T–RH relationships and acclimatization).
- Inspection and cleaning
- Periodic identification and inspection procedures, with advice to avoid water pooling, fingerprints and organic vapors that can migrate through layers.
Practical applications - who uses ISO 18925:2013
- Archives, libraries, museums and cultural heritage institutions planning long‑term preservation of optical media.
- Government agencies and enterprises holding long‑term audio/video or instrumentation records.
- IT and records management teams defining media retention and storage facilities.
- Manufacturers and media suppliers referencing best practices for packaging, labelling and conditioning.
- Facilities designers specifying HVAC, dehumidification, filtration and fire‑protective storage for media vaults.
Related standards and references
- ISO/IEC 15486 - WORM optical disk cartridge format (normative reference).
- NFPA 75 - Protection of electronic computer/data processing equipment (normative reference).
- ISO 18921 - Methodology for estimating CD‑ROM life expectancy (referenced in the Introduction).
Using ISO 18925:2013 helps organizations implement proven, standards‑based optical disc storage practices to maximize media longevity and reduce risk of data loss. Keywords: ISO 18925:2013, optical disc storage, archival storage, humidity and temperature, disc preservation, CD/DVD storage.
