Photographic Activity Test - Wikipedia

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Photographic Activity Test (PAT) is an ISO standard test detailed in ISO 18916:2025 (E), updated in 2025.^[1] Previous versions of the standard were numbered ISO 14523:1999(E).^[1]

The test evaluates materials for archival quality and their use in photographic enclosures. Many different types of materials can be tested including: paper, boards, plastic, adhesives, pens, stickers, labels, paints and inks. The test involves incubating samples and detectors in a high-temperature, high-humidity accelerated aging environment.

References

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1 2 "ISO 18916:2025 - Imaging materials — Photographic activity test for enclosure materials — Processed silver‐gelatin and dye‐gelatin prints". ISO. March 2025. Current as of 2026

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