| 摘要 |
<p>Method of forming a magnetic track having physical properties which vary along the length of the track, starting from a support having at least one magnetic track deposited in the usual manner, comprises (a) depositing on the magnetic track a photosensitive layer, (b) exposing the track to a radiation corresp. to the sensitivity of the photosensitive material through a mask according to a desired pattern, (c) removing the unirradiated portions of mask by dissolution, (d) forming an incrustation into the magnetic track in those parts not removed by applying heat and pressure simultaneously to the track. Used for magnetic bank cards etc.</p> |
