Overview
ISO 18948:2018 - Imaging materials - Photo books - Test methods for permanence and durability - defines standardized test methods to assess the permanence and durability of photo books, including both covers and pages. It applies to photo books containing reflective colour prints from any printing route (traditional analogue or modern digital). Because of the many combinations of sizes, cover materials and bindings, the standard requires testing a representative selection of printed pages, cover materials and binding options rather than every possible combination.
Key technical topics and requirements
ISO 18948:2018 organizes test methods across image stability and physical book integrity. Major technical topics include:
- Image permanence tests for covers and pages: procedures for evaluating degradation risks to printed images during storage and use.
- Thermal stability (long-term dark storage): assessing image and material stability under elevated temperature/storage conditions.
- Light, ozone and humidity stability: standardized methods to evaluate the effects of light exposure, atmospheric ozone and varying humidity on both pages and covers.
- Book integrity tests: mechanical tests for binding durability such as page-pull, peeling/delamination, internal bond strength and laminate adhesion.
- Heat durability and book-block attachment: tests that assess how attachment methods hold up to thermal stress and repeated opening/closing.
- Book blocking and deformation: methods to test blocking (transfer/adhesion between pages), page waviness and cover warp caused by humidity or storage.
- Test sample preparation, ageing conditions, reporting: guidance on specimen selection, conditioning, test environments and standardized reporting practices.
- Informative annexes on abrasion, extreme photo book tests, sandwich thermal testing and normative lamination/delamination procedures.
Practical applications and who uses this standard
ISO 18948 is used for:
- Quality assurance and specification development by photo book manufacturers, print service providers and publishers.
- Product development and R&D for material suppliers (paper, laminates, adhesives, covers) to validate durability claims.
- Conservation professionals, archivists and libraries assessing long‑term storage behaviour of modern photo books.
- Independent testing laboratories performing standardized durability and permanence testing.
- Procurement and compliance teams specifying durability requirements for consumer and professional photo products.
Using ISO 18948 helps ensure consistent, comparable durability data, supports material selection, reduces product failures in use or storage, and enables credible marketing claims about photo book permanence.
Related standards