Abstract
At a printing-works in Munich it was observed over a period of several years, in fully air-conditioned rooms, that the diffusion times of ions, penetrating a gelatin layer during the etching process of the printing cylinders, showed irregular fluctuations about the expected value within the range from −20% to +110%. Concurrent measurements of several meteorological parameters led to the detection of a strong linear relationship between the diffusion time of ions and the absolute humidity (AH-value) of the outside air. The AH-value seems to act as an indicator for part of the natural electromagnetic radiation affecting the properties of the gelatin film.
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Baumer, H., Eichmeier, J. Relationship between the diffusion time of ions in gelatin films and the absolute humidity in free air. Int J Biometeorol 23, 69–75 (1979). https://doi.org/10.1007/BF01553378
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DOI: https://doi.org/10.1007/BF01553378