| 摘要 |
PROBLEM TO BE SOLVED: To detect the magnetic quantity of a printed matter correctly even under a state where ink is not yet dried up. SOLUTION: A just printed matter, where ink is not yet dried up, is mounted on a baseboard 2 and the printed surface of the printed matter is scanned, over the entire part thereof for detecting the magnetic characteristics, by means of a magnetic detection head while keeping a small gap thus detecting the magnetic characteristics of ink. |
