| 摘要 |
A black ink set is provided which, in a middle to high lightness region of images, can improve image quality, especially lightfastness and gradation, and can reduce graininess. The black ink set comprises at least a first black ink composition and a second black ink composition, wherein the first black ink composition has a lightness (L*) in the range of 1 to 30 as calculated from the spectral transmittance of a 1000-fold dilution of the first black ink composition and the second black ink composition has an L* value in the range of 35 to 80 as calculated from the spectral transmittance of a 1000-fold dilution of the second black ink composition and contains a compound represented by formula (I) as a colorant:wherein R represents a C1-6 alkyl group, a hydroxyl group, or a group -NR1R2 in which R1 and R2 each independently represent a hydrogen atom or a C1-6 alkyl group; and M represents an alkali metal or a group -NR1R2 in which R1 and R2 each independently represent a hydrogen atom or a C1-6 alkyl group.
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