Rapid Drying of Normally Processed Black-and-White Motion Picture Film

F. Dana Miller

The introduction of rapid drying technique for rapidly processed film suggests its possible application for the drying of normally processed motion picture films. Consideration of the drying process seems to indicate that hot impinged air should be the most satisfactory method of commercial practice. Experiments were made on a laboratory machine in which the film passes between two parallel air chambers. Small holes in the sides of the chambers facing the film permit hot air to impinge on both sides of the film. Air temperatures ranging from 125 F to 210 F and air velocities of 2,000 to 6,000 fpm were used. Eastman Fine Grain Release Positive Safety Film was dried in 10 sec on laboratory equipment of this type and Eastman Plus X Panchromatic Negative Safety Film was dried in 16 sec. The physical properties of several films dried in this equipment were quite similar to the properties of conventionally dried films, but this is not true for all types of film. Rapid driers can be extremely compact and their power requirements should be no greater than for conventional driers.

Print ISSN
Published
1953-02
Content type
Original Research
DOI
10.5594/J01104