(Received 24 March 1977; accepted 12 December 1977)
Published Online: July
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Over the years police literature has generally recommended plaster of Paris  or dental plaster  to make casts at crime scenes. Even extremely unsophisticated testing indicates that different types of plaster vary considerably in tensile strength, hardness, and setting times under similar environmental conditions. Test studies indicate that plaster of Paris and dental plaster are the least suitable materials for police use because they are the least resistant to breakage and abrasion .
Chief, Hypobaric Research Chamber, Division of Aerospace Pathology, Forensic Sciences Department, Armed Forces Institute of Pathology, Washington, D.C.
Fellow, Armed Forces Institute of Pathology, Fort Rucker, Alabama
Stock #: JFS10713J