Ink, ink set, and inkjet recording device

An ink set, comprising:

• an ink;
• and
• a black ink,
• wherein:
• the ink comprises water, a pigment, and a first water-soluble organic solvent;
• the first water-soluble organic solvent comprises a water-soluble organic solvent (G) having a boiling point of 280° C. to 300° C., a water-soluble organic solvent (X) having a boiling point of 180° C. to 190° C., and a water-soluble organic solvent (Y) having a boiling point of 190° C. to 200° C.,
• the ink satisfies the following formulae:
• 24≦X≦40
• 2≦X/Y≦20
• where
• X [% by mass] is an amount of the water-soluble organic solvent (X), and
• Y [% by mass] is an amount of the water-soluble organic solvent (Y);
• the ink is a cyan ink, or a yellow ink;
• the black ink contains water, a pigment, and a second water-soluble organic solvent;
• the second water-soluble organic solvent comprises the water-soluble organic solvent (G), the water-soluble organic solvent (X), and the water-soluble organic solvent (Y);
• and
• the black ink satisfies the following formulae:
• 20≦X′<24
• 2≦X′/Y′≦20
• where
• X′ [% by mass] is an amount of the water-soluble organic solvent (X) in the black ink, and
• Y′ ro by mass] is an amount of the water-soluble organic solvent (Y) in the black ink.

An ink set, comprising:

• an ink;
• and
• a magenta ink,
• wherein:
• the ink comprises water, a pigment, and a first water-soluble organic solvent;
• the first water-soluble organic solvent comprises a water-soluble organic solvent (G) having a boiling point of 280° C. to 300° C., a water-soluble organic solvent (X) having a boiling point of 180° C. to 190° C., and a water-soluble organic solvent (Y) having a boiling point of 190° C. to 200° C.;
• the ink satisfies the following formulae:
• 24≦X≦40
• 2≦X/Y≦20
• where
• X [% by mass] is an amount of the water-soluble organic solvent (X), and
• Y by mass] is an amount of the water-soluble organic solvent (Y);
• the ink is a cyan ink, or a yellow ink;
• the magenta ink comprises water, a pigment, and a third water-soluble organic solvent;
• the third water-soluble organic solvent comprises the water-soluble organic solvent (G), and the water-soluble organic solvent (X), but free from the water-soluble organic solvent (Y);
• and
• the magenta ink satisfies the following formula:
• 24≦X″≦40
• where
• X″ [% by mass] is an amount of the water-soluble organic solvent (X) in the magenta ink.