The moisture content of archival materials plays a crucial role in their preservation. Excessively high moisture levels can promote the growth of mold, mildew, and other destructive agents, leading to the deterioration of valuable documents.
What is an Acceptable Damp Reading?
The ideal damp reading for archival documents varies depending on the type of material and storage conditions. Generally, the following ranges are considered acceptable:
- Paper: 45-65% RH (relative humidity)
- Parchment: 50-65% RH
- Leather: 40-60% RH
li>Textiles: 45-65% RH
Monitoring Damp Readings
Regularly monitoring damp readings is essential to ensure the preservation of documents. This can be done using various devices, such as hygrometers or moisture meters.
Consequences of Exceeding Damp Readings
When damp readings exceed acceptable levels, the following risks become apparent:
- Growth of mold and mildew: High moisture levels create an ideal environment for the growth of microorganisms, leading to the discoloration and deterioration of documents.
- Paper decay: Excessive moisture can cause paper to become brittle and crease, making it susceptible to tearing.
- Ink fading: Dampness can cause the ink in documents to fade, impairing their legibility.
Conclusion
Maintaining acceptable damp readings is crucial for the long-term preservation of archival documents. By monitoring damp readings regularly and taking appropriate measures to control moisture levels, institutions can safeguard their valuable collections for future generations.