| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheet for optical reading which uses a red color drop out color ink as usual or blue color drop out ink together according to a reading light source on printing unreadable part, and which has not monotonous tone and also can be used for reading light source for both of red and blue color by using drop out color inks of different tone on one sheet. SOLUTION: Each blank for information 4, 5, 6, 7, 8, 9, 10, 11 which is an optical unreadable drop out color part prepared in a prescribed part on the surface of the sheet is printed by drop out color ink whose reflectance in both wavelength part of red and blue color is over 60%. |
