ISO 18916:2025
Imaging materials — Photographic activity test for enclosure materials — Processed silver‐gelatin and dye‐gelatin prints
Imaging materials — Photographic activity test for enclosure materials — Processed silver‐gelatin and dye‐gelatin prints
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 19
- Дата публикации:
- 21 марта 2025 г.
- Издание:
- ISO IS 18916 edition 2 version 1
- ICS:
- 37.040.20
This document specifies the test method for evaluating possible chemical interactions between enclosures and photographic materials that are produced in a light sensitive silver halide and gelatin containing layer, processed using wet chemistry and where the final image retains metallic silver, herein referred to as silver-gelatin materials. Modified versions of the test method are applicable to chromogenic (dye coupler) and diazo photographic materials (see Annex A). This document is applicable to all general photographic enclosure materials used for storage, display, and transport, such as paper, tissue, cardboard, mat board and plastics. It is also applicable to components of photographic enclosure materials such as adhesives and marking substances, including inks, paints, labels, and tape. This document applies to all storage, display, and transport materials used for silver-gelatin photographs whether intended for short or long-term use (see Annex E). This document does not apply to non-silver-gelatin imaging systems. It does not pertain to harmful physical interactions such as blocking (sticking together), dye bleed, adhesive migration, or plasticizer exudation. It does not pertain to important criteria of enclosures such as their inherent chemical stability, physical integrity, and workmanship. Passing the photographic activity test (PAT) alone does not indicate that a material is archival. Quality requirements for photo-safe storage enclosures and their components are covered in ISO 18902, which includes passing the criteria of the PAT.
Abstract
Overview
ISO 18916:2025 - Imaging materials - Photographic activity test for enclosure materials - Processed silver‑gelatin and dye‑gelatin prints - specifies a laboratory test method (the Photographic Activity Test, PAT) to evaluate chemical interactions between enclosure materials and processed silver‑halide/gelatin photographic prints. The test uses silver‑gelatin detectors to identify image interaction, staining, and mottling caused by enclosure materials or components (e.g., paper, plastics, adhesives, inks, tapes). Modified procedures for chromogenic (dye‑coupler) and diazo images are provided in Annex A.
Key topics and requirements
- Scope and applicability
- Applies to processed silver‑gelatin photographic materials; normative modifications for chromogenic and diazo systems (Annex A).
- Covers enclosure materials used for storage, display, and transport (paper, tissue, board, plastics) and their components (adhesives, marking substances).
- Does not apply to non‑silver‑gelatin imaging systems nor to physical problems such as blocking, dye bleed, adhesive migration, or plasticizer exudation.
- Test design and detectors
- Uses silver‑gelatin image interaction and stain detectors and evaluates mottling (non‑uniform density variations).
- Test parameters and measurement procedures are specified (apparatus, incubation, measurement).
- Performance criteria and reporting
- Procedures for image interaction, stain, and mottle tests include calculation and pass/fail requirements.
- Test report requirements are defined so results can be interpreted for long‑ or short‑term use (see Annex E).
- Quality and retesting
- PAT is a predictive chemical‑interaction test; passing the PAT alone does not make a material archival.
- The 2025 revision recommends batch/lot testing and retesting after formulation or supplier changes (annual testing removed).
Practical applications
- Museums, archives, libraries, photographic conservators, manufacturers of storage enclosures, and quality control labs use ISO 18916:2025 to:
- Screen papers, plastics, tapes, adhesives, inks, and labels for chemical reactivity with silver‑gelatin photographs.
- Validate materials for storage, framing, transport, or exhibition before wide use.
- Support procurement decisions and product specifications for photo‑safe enclosures.
- Conservators use Annex E guidance when interpreting PAT results for short‑term display or transport scenarios.
Related standards
- ISO 18902 - Materials for enclosures: photo‑safe storage requirements (includes PAT criteria)
- ISO 18901, ISO 18905, ISO 18912 - Specifications for various photographic films
- ISO 18911, ISO 18918, ISO 18920 - Processing and storage condition guidance
- ISO 5‑2/5‑3/5‑4 - Density measurement standards referenced by ISO 18916
Keywords: ISO 18916:2025, photographic activity test, PAT, silver‑gelatin, chromogenic, diazo, enclosure materials, archival storage, adhesives, inks, photographic conservator.
Технические детали
- Технический комитет
- ISO/TC 42 - Photography
- SKU
- ISO 18916:2025
Похожие стандарты
Стандарты, упомянутые в описании