Overview
ISO 18928:2026 is an international standard developed by ISO for establishing best practices and recommended storage conditions for unprocessed photographic films and papers containing silver halide. This document aims to ensure the preservation of photographic materials before processing by minimizing the negative impact of environmental factors such as temperature, humidity, gases, and extraneous radiation. ISO 18928:2026 applies to both black-and-white and color photographic materials, including negative films, positive films, reversal films, positive papers, and X-ray films. The standard provides guidance primarily for photofinishing laboratories, wholesalers, retailers, and professional and amateur photographers involved in the silver halide materials supply chain.
Key Topics
Main aspects covered in ISO 18928:2026 include:
- Storage Conditions: Recommends environmental parameters such as temperature and relative humidity for short-term and long-term storage to maintain the quality of unprocessed photographic films and papers.
- Temperature and Humidity Control: Advises maintaining relative humidity between 40% and 60% and temperature guidelines based on storage duration, with lower temperatures recommended for extended storage.
- Protection from Gases and Radiation: Stipulates that harmful gases (e.g., hydrogen sulphide, sulfur dioxide), industrial emissions, and exposure to extraneous radiation must be avoided as they can degrade photographic materials prior to processing.
- Acclimatization Procedures: Details necessary steps for bringing cold-stored materials to room temperature before opening packages to prevent condensation and physical damage.
- Mechanical and Handling Guidelines: Specifies proper storage orientations for rolls and sheets, as well as recommended laboratory climate and safe handling practices to avoid physical or static damage.
- Impact of Adverse Conditions: Acknowledges the increased risks of latent image fading, fogging, and physical damage due to deviations from proper storage conditions.
Applications
ISO 18928:2026 is essential for any organization or individual involved in the storage, distribution, or use of unprocessed photographic films and papers. Practical value includes:
- Photofinishing Laboratories and Retailers: Ensures material integrity during storage and transit by following specified humidity and temperature ranges, reducing spoilage and quality complaints.
- Professional and Amateur Photographers: Assists in planning storage strategies for unprocessed films and papers, especially when stored for long periods or transported through environments with fluctuating temperatures or radiation risks (e.g., airports).
- X-ray Facilities: Provides guidelines for handling sensitive X-ray films, including recommendations for minimizing exposure to radiation sources and gases in storage areas.
- Archival and Cultural Institutions: Supports the preservation of photographic heritage by mitigating risks of chemical and physical deterioration before image development.
By implementing ISO 18928:2026, users can extend the shelf life of silver halide materials and reduce the risk of latent image loss and material degradation, thereby safeguarding the quality and value of photographic work.
Related Standards
Several other standards complement ISO 18928:2026 by addressing practices for processed materials and related storage issues:
- ISO 18906: Imaging materials - Photographic films - Specifications for safety film
- ISO 18911: Imaging materials - Processed safety photographic films - Storage practices
- ISO 18918: Imaging materials - Processed photographic plates - Storage practices
- ISO 18920: Imaging materials - Reflection prints - Storage practices
Adopting ISO 18928:2026 in combination with these related standards ensures comprehensive management of photographic materials throughout their lifecycle, from pre-processing storage through to archiving of finished products.