| 摘要 |
PROBLEM TO BE SOLVED: To provide an inkjet recording method by which whether marking with a stealth ink is performed or not can be easily determined.SOLUTION: The inkjet recording method is characterized in that the following stealth non-aqueous ink is used to mark a print target surface of a permeable recording medium by inkjet printing and then the print target surface is printed with a chromatic ink by inkjet printing. The stealth non-aqueous ink comprises at least a solvent and a stealth coloring material that is invisible under visible rays but emits visible light under irradiation with UV rays or IR rays, in which 30 mass% or more of the solvent comprises a non-aqueous solvent having a boiling point of 180°C or higher and 350°C or lower. In this method, immediately after marking with the stealth non-aqueous ink, a show-through phenomenon is induced in the recording medium, which enables an observer to visibly inspect the presence or absence of ejection failure of the stealth ink. After the non-aqueous solvent volatilizes (about one day after printing), the mark is no more visible under visible light and has excellent stealth property.SELECTED DRAWING: None |
