Avoid storing paper items against outer walls as the greatest variation of temperature and humidity occurs there. Unless a basement is waterproof and has a relative humidity level of less than 55 percent, it should not be used for storage of valuable items. Paper items can be encapsulated in polyester film. The tape should not touch the paper. Precut, taped kits are available from conservation supply houses.
Encapsulation protects items for handling.
Lamination is not reversible and should be avoided to prevent permanent damage. Special problems and questions regarding valuable paper documents may be directed to the Assistant Director for Preservation, Administration Department, Library of Congress, Washington, DC 20540. Local libraries, museums, or the Nebraska State Historical Society in Lincoln, Nebraska may be of help. Trade names used in this publication are for information only and do not imply endorsement of products named nor criticism of similar products not mentioned. The Care of Antiques and Historical Collections .