Permanent papers Introduction Permanent papers should retain the properties that influence readability and document handling when stored in a protected environment for long periods. Permanence may also concern materials, i.e. papers and boards, used for enclosures of documents and photographic material in storage. The requirements of permanence are based on either on certain tests of
To access this post, you must purchase All themes. Do you already have a membership or are you part of an organization? log in