. The directional spectrum of a wind generated sea as determined from data obtained by the Stereo Wave Observation Project. Stereo Wave Observation Project (Scientific experiment); Ocean waves. TABLE VI. Shrinkage of EK Nitrate MP Film. % Shrinkage 10 weeks % Shrinkage 20 weeks % Shrinkage 30 weeks % Shrinkage 40 weeks Rolls in taped cans 0«08 Rolls in untaped cans Strips open to air QM fiCZ, YEARS Fig. 3. Shrinkage vs. age for triacetate and nitrate prints scrapped afte- normal theater use. Measurements made at 70 F and 50% |Q4 !„_ o a F
. The directional spectrum of a wind generated sea as determined from data obtained by the Stereo Wave Observation Project. Stereo Wave Observation Project (Scientific experiment); Ocean waves. TABLE VI. Shrinkage of EK Nitrate MP Film. % Shrinkage 10 weeks % Shrinkage 20 weeks % Shrinkage 30 weeks % Shrinkage 40 weeks Rolls in taped cans 0«08 Rolls in untaped cans Strips open to air QM fiCZ, YEARS Fig. 3. Shrinkage vs. age for triacetate and nitrate prints scrapped afte- normal theater use. Measurements made at 70 F and 50% |Q4 !„_ o a Fig. 4. Average rate of shrinkage of processed triacetate 39aim motion-picture positive film at 90 F and 90% Con- trolled tests on strips freely exposed to circulating air; all meas- urements made after reconditioning at 70 F and 50% Kodak aerial films are now coated on two bases. Kodak Aerographic films, (Type lA) are made on low shrink topographic base, suitable for use in accurate mapping work. Regular Safety Aero base is used for Kodak Ektachrome Aero film, and Recon film. The latter has somewhat higher shrinkage characteristics than the Type lA. A comparison of dimensional changes in the two bases is shown in Table VII. Since 1941, Type lA (topographic) film base has been made from cellulose acetate butyrate. Between 1938 and 1941, it was made from cellu- lose acetate propiomate. Both these bases have substantially lower humid- ity expansion coefficients than cellulose acetate, used prior to 1938. 264. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Chase, Joseph; New York University. School of Engineering and Science; United States. Office of Naval Research. New York : New York University, College of Engineering, Research Division, Dept. of Meteorology and Oceanography and Engineering STati
Size: 2230px × 1120px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
