Theory 159/Paper ageing/Ratio lens
Lifetime Is Moisture Against Temperature
The claim
Paper lifetime is set by the ratio of moisture to temperature, so a cool humid store can be worse than a warm dry one.
01Mechanism
Both drive hydrolysis but moisture also enables mould; the ratio determines which damage dominates.
02Prediction
Lifetime should track the ratio.
03Refutation
Lifetime tracking temperature would remove humidity.