| abstract |
To provide an ink capable of forming an image with a high image density, suppressing clogging, curling, and excellent in pigment dispersion stability. A pigment, a dispersant, a penetrating agent, water, a compound having two hydroxyl groups in the molecule, a compound having three hydroxyl groups in the molecule, and a compound having four or more hydroxyl groups in the molecule. And the content of the pigment is in the range of 7% by weight to 20% by weight, and the content of the compound having two hydroxyl groups in the molecule is in the range of 1% by weight to 10% by weight. The content of the compound having 3 hydroxyl groups in the molecule is in the range of 2% by weight to 20% by weight, and the content of the compound having 4 or more hydroxyl groups in the molecule is 25% by weight or more. An ink having a content of 50% by weight or less. [Selection figure] None |