The Preservation Directorate at the Library of Congress developed specifications for the supplies and materials used to house the Library's collections. The specifications are subject to change and are made available generally as a public service. Any commercial reproduction of these specifications that implies endorsement of a product, service, or materials, in any publication, is strictly prohibited by law. Comments or questions about the specifications may be submitted to the Library's Preservation Directorate by clicking the Ask a Librarian button at the top of the page and selecting Preservation.
The pdf links above represent the most recent specifications. Specifications for other supplies may become available.
Library of Congress
Washington, D.C. 20540-4500
Internet form: Ask a Librarian.