Encapsulation is a method of safely protecting flat items between two sheets of clear archival polyester film, often referred to as Mylar. After treating your collectibles with cleaning, deacidification, and any additional restoration and conservation, it is best to provide a stable environment to prevent future damage and deterioration. For most paper items, such as letters, maps, and posters, we will typically encapsulate the document in a Mylar sleeve, sealed on all four sides, or in a custom 'L-style' Mylar folder, leaving two sides open to facilitate easy removal. The Mylar allows a document to be handled without the transfer of harmful oils from your skin that could lead to further damage, as well as creating a microclimate around the document.
"The man who does not read good books has no advantage over the man who cannot read them." —Mark Twain