| 摘要 |
A reactive color ink that contains a metal ion and exhibits mutual reactivity with a blank ink is applied in an area including a print area, which has been formed by applying the blank ink on a recording medium, and an area surrounding the print area, a distance between an edge of the print area and an outer edge of the surrounding area being up to four pixels. This ink application is performed so that a value at least equal to 0.01 is obtained from a calculation where a metal ion concentration % by weight in the reactive color ink applied in the area including the print area and the surrounding area is multiplied by a print duty % of the reactive color ink applied in the area including the print area and the surrounding area.
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