Review of machine washing efficiency for original film
Further silver sulfide stain tests for wash efficiency were conducted with major emphasis on means by which archival keeping quality may be achieved for original mission film.
Maas, K. A.↗
Engineering topics
Maas, K. A.
Publications and source records attributed to Maas, K. A..
Duplication train of SO-212 film for Skylab S-056 experiment
A section of film type SO-212 containing resolution targets was printed onto film type 5302 to produce a second generation master positive. This positive was then printed onto negative duplicating film type 5234. Samples and enlargements from sections of the film are presented. The original film is free of physical defects from this duplicating test. It has been demonstrated that SO-212 film can be duplicated without appreciable harm to the original.
Maas, K. A.↗
Film handling procedures for Skylab S-056 experiment
In a simulation conducted August 28, 1972, two rolls of Type SO-212 film were rewound in the sensitometer darkroom preparatory to processing. The first roll contained approximately 500 feet of film exposed to a resolution target and was unloaded from a can. The second roll of 1000 feet, with about 600 feet advanced to the takeup side, was in a flight magazine. The downloading and rewinding of this second roll of film is described in detail.
Maas, K. A.↗
Wash efficiency tests
Processed film products were tested for residual thiosulfate by precipitation as colored silver sulfide. The quantity of thiosulfate was determined and correlated with the expected storage life of the film.
Maas, K. A.↗
Protective overcoating of films
Kodak Film Type SO-212 was emulsion overcoated with gelatin and lacquer to evaluate the feasibility of application of the coatings, any image degradation, and the relative protection offered against abrasion. Evaluated were: Eastman motion picture film lacquer Type 485, water solutions of Eastman purified Calfskin gelatin, and experimental Eastman gelatin stripping film of 4 and 6 microns. Conclusions reached were: (1) All coatings can be applied with relative ease with the only limitation being that of equipment. (2) None of the coatings degrade the processed image. (3) All of the coatings provide protection to the emulsion. These conclusions apply to any film which may be considered for overcoating.
Maas, K. A.↗