The ability to remain chemically and physically stable over long periods of time.[ISO 9706]
ISO 11108:1996(en), 3.2
alkali reserve (of a paper)
A compound (such as calcium carbonate) that neutralizes acid that might be generated as a result of natural ageing or from atmospheric pollution, determined as specified in ISO 10716.
[ISO 9706]
ISO 11108:1996(en), 3.4
archival paper
Paper of high permanence and high durability.
ISO 11108:1996(en), 3.1
durability
The ability to resist the effects of wear and tear when in use.