To provide ink for inkjet, having a high density at a part having a high recorded image density and a sharp boundary and on the other hand, in a high light part having a low recorded image density, capable of obtaining a higher quality recorded image having a reduced granular feeling, while suppressing the cost of the inkjet-recording device as low.
This ink set for the inkjet having at least in a plurality of ink of a similar color series having different dyestuff concentration is provided by exhibiting the R (pale) in a thin ink having a low dyestuff concentration higher than the R (deep) in a thick ink having a high dyestuff concentration and also having ≥1.2 R (deep) in measuring the ratio R of a dot diameter obtained by forming the dot by attaching the ink on a recorded medium, and then standing the recorded medium still under an environment of a normal temperature and normal humidity (25°C/relative humidity 50 %) for 10 min to the dot diameter after standing still under a high temperature and high humidity (40°C/relative humidity 90 %) for 7 days.
ASAKI NORIYASU
NAKAMURA KUNIHIKO
TSUJI ITARU
MISHINA SHINYA
| JP2001096768A | 2001-04-10 | |||
| JP2001121806A | 2001-05-08 | |||
| JPH1148502A | 1999-02-23 | |||
| JPH06328678A | 1994-11-29 | |||
| JP2001254035A | 2001-09-18 | |||
| JPS6455248A | 1989-03-02 |
Nobuyuki Kaneda
Katsuhiro Ito
Ishibashi Masayuki