Journal of the Society of Motion Picture and Television Engineers (1950-1954)

Page scan 000106 from Journal of the Society of Motion Picture and Television Engineers

Record Details:

Title:
Journal of the Society of Motion Picture and Television Engineers
Date:
1950-1954
Publisher:
Easton, Pa. : The Society
Volume:
Journal of the Society of Motion Picture and Television Engineers
Leaf #:
000106
Language:
English
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Prelinger Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Date Added:
July 19, 2022
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20 30 40 50 DRYING TIME SECONDS 60 Fig. 9. Effect of Air Velocity on the Drying of Eastman Super XX Panchromatic Negative Safety Film, Type 5232, at 200 F Air Temperature. Curve 1 2 3 Air Velocity, fpm 2,000 4,000 6,000 Fig. 8. No doubt there was actually some improvement in drying when the air velocity was increased from 4,000 to 6,000 fpm, but it was so slight that it could not be detected in these experiments. Figure 9, however, shows that at 200 F increasing the air velocity through this range reduces the required drying time from 17 sec to 14^ seconds or about 15%. Apparently, at this temperature, somewhat faster drying time could be obtained at velocities in excess of 6,000 fpm but the experiments indicate that at some point, probably about 8,000 fpm, practical minimum required drying time would be attained. Figures 5, 6, 7, 8 and 9 show that the velocity at which the required drying time reaches a minimum is a function of the drying air temperature. It is also believed to be dependent on the particular arrangement of the machine. The size, number, and spacing of the air jets as well as the passage of the air F. Dana Miller: Rapid Film Drying 97