Incorrect Temperature - Agents of DeteriorationToo high:causes gradual disintegration or discolouration of organic materials, especially if they are chemically unstable (e.g., acidic paper, colour photographs, nitrate and acetate films). NOTE: Most materials decompose gradually at room temperature, but the time scale for complete destruction is in millennia. Too low: causes embrittlement, which results in fractures of paints and of other polymers. Fluctuations: cause fractures and delamination in brittle, solid materials, especially if they are layered. cause RH fluctuations (see "Incorrect Relative Humidity"). |
