| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a magnetic pattern which can be formed on white paper in an inconspicuous manner by enabling matching inspection without X-ray, and further formed by an ink jet recording system, a magnetic ink suitably used to form the magnetic pattern, a production method thereof, a sheet with the magnetic pattern, which is suitably used for a collected matter, and a production method thereof. <P>SOLUTION: The magnetic ink includes a colloid containing magnetic particles and silver particles. The magnetic pattern is formed using this magnetic ink. The sheet has this magnetic pattern formed on a surface of a white sheet substrate by use of the magnetic ink. The production method of the magnetic ink includes the step of mixing a magnetic colloid with a silver colloid. The production method of the sheet with the magnetic pattern includes the step of applying the magnetic ink produced by the magnetic ink by the production method of the magnetic ink including the step of mixing the magnetic colloid with the silver colloid to one surface of the white sheet substrate. <P>COPYRIGHT: (C)2009,JPO&INPIT |
