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Photographic Activity Test (PAT) is an ISO standard test detailed in ISO 18916:2007 (E), updated in 2007.[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.


  1. ^ a b "ISO 18916:2007 - Imaging materials — Processed imaging materials — Photographic activity test for enclosure materials". ISO. October 2007. Current as of 2020