
EN 15757: why the fluctuations do more harm than the level
The standard measures against the room's own historical climate, not against 50% humidity. See what a safe band is, and when it counts as established.
StandardPreservationHumidityMuseums and galleries

Preservation monitoring: six answers on whether the climate is harming the collection
Temperature and humidity alone do not tell you whether the objects are safe. See the six analyses that translate the readings into preservation.
ModulePreservationMuseums and galleriesArchives and libraries
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