The way in which a photographic material dries is commonly represented as a plot of rate of vaporization vs. time. Generation of these curves in the past has been a lengthy, error prone process. This project's attempt was to greatly simplify the generation of these curves. A photographic drier with a thermal sensing element was designed, constructed, and tested. The drier produces a heated air flow perpendicular to the film plane. A thermistor prope was placed in contact with the base of the film to sense the temperature of the film during drying. A rate of vaporization curve was obtained by determining the per cent moisture vaporized from the film at descrete time intervals by weighing the film in its semi-dry and dry state. This data was correlated with the temperature data obtained from the apparatus. Good correlation was found at the constant rate period between both methods. However no correlation was found between the methods during the falling rate period.

Library of Congress Subject Headings

Photography--Equipment and supplies--Testing; Photography--Films

Publication Date


Document Type


Department, Program, or Center

School of Photographic Arts and Sciences (CIAS)




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