Government discovers method to preserve film. Classic, Vintage Print

Step back in time with this striking reproduction of Government discovers method to preserve film. Classic. Sourced from the United States Library of Congress.

Library of Congress record: Created 1938 July 8 Gift; Harris & Ewing, Inc. 1955. General information about the Harris & Ewing Collection is available at Government discovers method to preserve film. (2) Expansion and contraction, like paper and other sheet materials made from cellulose, films expand as they take up moisture and contract as they lose it, and the extent of the change is different in the two directions of them. This may cause some distortion of the image, and therefore is of particular importance where the image must be true to scale, such as in aerial photography. C.O. Pope is shown with a type of expansiveity tester used and which was designed by the Bureau of Standards. Long strips of film are suspended under constant tension in the [cabinet?] in which the humidity is varied by means of [...].

Available framed in a classic black wood frame ready to hang, or unframed for custom display. An elegant choice for any living room, study, or professional office. Makes a thoughtful and distinctive gift