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·· To evaluate the inclination of recorded magnetization, the Bitter pattern technique has been applied to a longitudinally recorded VTR tape consisted of acicular Fe particles. The contrast of Bitter patterns evolved in an external magnetic field of 200 Oe with various orientations is observed for 0.5 and 1.0 kFCI recordings, and the inclination angle is found to be O· and 180· for both recordings, as expected. Alternate appearence of dark magnetic transition line is observed when the angle of the magnetic field is larger than 30· for both recordings, and this agrees well with the calculation of deposited colloid density on the tape. Changes of the contrast of patterns with the angle of magnetic field are also compared with the calculation.

EVALUATION OF INCLINATION OF MAGNETIZATION ON A LONGITUDINALLY RECORDED TAPE BY THE BITTER PATTERN TECHNIQUE