Artifact Conservation and Historical Archaeology at Historic St. Mary's City

Glossary

Archival: acid-free and lignin-free paper products designed for preservation purposes; these materials possess a neutral 7.0 or slightly alkaline pH.
Hygrothermograph: a tool that accurately records the air temperature and RH (relative humidity) of areas that house artifacts.

HVAC: the acronym for a heating, ventilating, and air conditioning system within a building, which maintains the environmental condition suitable for the storage or exhibition of artifacts. It is important to remember that appropriate conditions will vary among artifacts. For example, metals will require a drier environment than other artifacts due to their highly reactive nature. Consult a conservator if questions arise.

IPM: the acronym for integrated pest management; these techniques work to control and eliminate the appearance of insects and other potentially destructive pests.

Mounts: archival storage trays for artifacts; created with acid-free paper board and polyethylene products such as Volara® and Ethafoam®. These structures and the materials used to create them support the center of gravity of each object and aid in shock absorption.

RH: the acronym for relative humidity; a measurement of the moisture maintained in a created environment as compared to the actual amount of moisture that same air could hold if completely saturated.