title: [Influence of ambient storage temperature on radiographic density and contrast of dated and outdated film].
abstract: The authors studied the influence of storage conditions of date and outdated films and the action of environment temperature over the same films. Four groups of films were studied: twenty-five outdated and twenty-five date films were under refrigeration; twenty-five date and twenty-five outdated films were under 36 degrees C temperature and 70% hygrometric for thirty days. Afterward, the films were exposed to radiation X at standardized conditions, together with an AI stepwedge penetrometer, to measure optical density; also the processing conditions were standardized. The results showed that temperature action and films date and outdated produced changes in the optical density and radiographic contrast.
authors.affiliation: Universidade de São Paulo.
authors.forename: P C
authors.initials: PC
authors.lastname: Watanabe
authors.forename: J R
authors.initials: JR
authors.lastname: Tamburus
authors.forename: G M
authors.initials: GM
authors.lastname: Campos
mesh_terms: D006813:Humidity; D011861:Radiography, Dental; D013696:Temperature; D014962:X-Ray Film
vernacular_title: Influência da temperatura ambiental de armazenagem sobre a densidade e o contraste radiográficos de filmes vencidos e não-vencidos.