| 摘要 |
PURPOSE:To enable magnetic latent images to be obtained on magnetic recording sheet simultaneously while visible images are being viewed at the recording by laminating pressure sensitive paper, magnetic recording sheet and high magnetic permeability material successively, and pressing the pressure sensitive paper with a magnetic pen. CONSTITUTION:Pressure-sensitive paper 2 which forms colors when microcapsules are broken by pressure, and a magnetic recording sheet 3 are provided, the latter by coating the magnetic material, such as r-Fe2O3, dispersed into a binder onto a base 5 of paper or the like thereby forming a magnetic recording layer 6. Next, a high magnetic permeability material 4 such as iron or magnetic stainless steel is laminated on the base. A magnetic pen having a fine wire 9 made of high magnetic permeability material at the tip provided with a permanent magnet 8 is pressed to the pressure sensitive paper 2 of the recording body 1 obtained in this way and the magnetic latent images are written in the magnetic recording layer 6 while the characters etc. displayed on the paper 2 are being viewed. The pressure sensitive paper 2 is peeled and the sheet 3 is preserved as a confidential document. If necessary, it is developed by magnetic powder 11 and is made legible by being developed. Magnetic powder 11 is put into a transparent vessel 12 and the sheet is readable even if the powder 11 is not placed directly on the sheet. |
