Abstract: This invention provides novel devices and methods for manipulation of moisture/fluid levels in and/or upon objects and is used to, e.g., safely dry wet books and documents with minimal deleterious side effects or to add humidity to such books/documents or other objects or areas.

Abstract: Method for using surface-tension properties of polished vinyl or other plastic sheeting as a reusable seal on a vacuum pressing bag. The bag must be of a high surface tension material such as polished vinyl to create the friction to create a seal. The vinyl bag consists of at least two pieces of vinyl welded at the edge on all sides. A slit through one piece of vinyl allows entry into the bag. Another vinyl strip that is wider and longer than the slit is placed over the opening. The polished surface of the vinyl or other polymer creates surface tension that “self-seals” under mild hand pressure creating a complete seal after suction is supplied to achieve evacuation. This surface tension is not released until the vinyl flap is pulled away from the slit. Because the “seal” is created using a physical property of the bag material, it will never wear out. If the seal is complete, constant pressure on the contents of the bag is maintained while evacuation proceeds. A conventional vacuum pump produces the vacuum.