Liquid composition, ink set, method of forming a colored section on recording medium and ink-jet recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorsHiroshi Tomioka, Masao Kato, Makiko Endo
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Abstract
This invention relates to a liquid composition adapted to be applied to a recording medium with ink containing a multi-color to form a colored section on the recording medium. The liquid composition contains fine particles reactive relative to the solvent and the coloring material in ink. When processed in particular steps, it produces aggregates of fine particles showing a specific surface area between 70 and 250 m2/g as determined by the BET nitrogen adsorption/desorption method.
Claims40
A liquid composition to be applied to a recording medium with ink containing a coloring material to form a colored section on the recording medium, said liquid composition containing at least a solvent and fine particles reactive to said coloring material, the specific surface area of aggregates of fine particles formed from the liquid composition by way of steps (1) through (4) listed below being 70 to 250 m2/g as determined by the BET nitrogen adsorption/desorption method,
- (1) a step of drying the liquid composition at 120° C. for 10 hours in the atmosphere to evaporate the solvent;
- (2) a step of raising the temperature of said dried product resulting from the step (1) from 120° C. to 700° C. in an hour and baking it at 700° C. for 3 hours;
- (3) a step of gradually cooling the baked product resulting from the step (2) to room temperature and pulverizing it;
- and
- (4) a step of deaerating the powder obtained in the step (3) by vacuum at 120° C. for 8 hours to obtain fine particles aggregates.
An ink set according to 18, wherein
- the acid shows a primary dissociation constant pKa of not more than 5 in water.
An ink set according to 21, wherein
- the base shows a primary dissociation constant pKb of not more than 5 in water.
A liquid composition to be applied onto a recording medium together with an anionic or cationic ink containing a coloring material, and used for forming a colored section on the recording medium, the liquid composition containing a solvent and fine particles reactive to the coloring material, wherein
- the fine particles adsorb or bind the coloring material on the surface thereof when the liquid composition and the ink are brought into contact with each other on the recording medium in a liquid state, the adsorbed or bound coloring material maintaining the same molecular state as that the coloring material is in the ink.
Dependencies are inferred from the claim text.