Imaging of mass distribution in paper by electrography technique (1). Establishment of electrography technique.
Hiroshi Tomimasu, Philip Luner · JAPAN TAPPI JOURNAL · 1990
A rapid method to measure the mass distribution in paper was developed.Paper is irradiated with electron beams with energies from 50 to 200 keV and the attenuation of the electron beams by the paper is detected by a photographic film.The image of the attenuation of the electron beams (electrograph) is converted into the mass distribution through a basis weight calibration.Theoretical calculations and experiments were made to optimize the imaging of the mass distribution.It was found that the mass distribution of paper from 0 to 400 g/m2 can be obtained in less than 1 second.