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

Page scan 000105 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 #:
000105
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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10 20 30 40 50 DRYING TIME SECONDS Fig. 8. Effect of Air Velocity on the Drying of Eastman Super XX Panchromatic Negative Safety Film, Type 5232, at 150 F Air Temperature. Curve 1 2 3 Air Velocity, fpm 2,000 4,000 6,000 time. This is definitely not the case. It was found that with any particular air temperature there is a maximum air velocity beyond which the decrease in required drying time is negligible. Eastman Super XX Panchromatic Negative Safety Film, Type 5232, was dried at 125 F with 2,000-, 4,000 and 6,000fpm air velocities. These same velocities were used with 150 F air and 200 F air. The results are shown in Figs. 7. 8 and 9, respectively. The actual dry point of this film is 3.1%, but since not all the experiments were carried to this point comparison at the 4% level corresponding to 60% R.H. will suffice. At 125 F there is a reduction of 35% to 40% in the required drying time by increasing the air velocity from 2.000 to 4,000 fpm, but when the velocity is raised to 6,000 fpm no measurable difference in required drying time is found. This is also true with air temperatures of 150 F as shown in February 1953 Journal of the SMPTE Vol. 60