Method for producing recording medium
AssigneeCanon Kabushiki Kaisha
InventorsTakahiro Mori, Hiroshi Sato
Life of this patent
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Abstract
A recording medium having a substrate and an ink-receiving layer formed on the substrate is provided by (a) dissolving a plurality of organic compounds in a first solvent which is a good solvent in common for all of the organic compounds to form a solution, applying the solution onto a substrate and evaporating the first solvent off to form an ink-receiving layer, and then (b) applying onto the ink-receiving layer a second solvent which is a poor solvent for at least one of the organic compounds and is a good solvent for the rest of the organic compounds and evaporating the second solvent off.
Claims28
A method for producing a recording medium having ( 1) a substrate and (2) an ink-receiving layer comprising a water-soluble high molecular organic compound having a molecular weight of not less than 5,000, and a water-insoluble low-molecular organic compound having a molecular weight of less than 5,000 and being formed on the substrate, wherein said method comprises the steps of (a) dissolving a plurality of organic compounds comprising a water-soluble high molecular organic compound having a molecular weight of not less than 5,000 and which has a solubility of not less than 10 g in 100 g of pure water at 25.degree. C., and a water-insoluble low-molecular organic compound having a molecular weight of less than 5,000 and which has a solubility of less than 1 g in 100 g of pure water at 25.degree. C. in a first solvent which is a good solvent in common for all of the organic compounds to form a solution, applying the solution onto a substrate and evaporating the first solvent off to form an ink-receiving layer, and then (b) applying onto the ink-receiving layer a second solvent which is a poor solvent for at least one of the organic compounds and is a good solvent for the rest of the organic compounds and evaporating the second solvent off.
A method for producing a recording medium having (1) a substrate and ink-receiving layer comprising a water-soluble high molecular organic compound having a molecular weight of not less than 5,000, and a water-insoluble low-molecular organic compound having a molecular weight of less than 5,000 and being formed on the substrate, said method comprising the steps of (a) dissolving with heating a plurality of organic compounds comprising a water-soluble high molecular organic compound having a molecular weight of not less than 5,000 and which has a solublity of not less than 10 g in 100 g of pure water at 25.degree. C., and a water-insoluble low-molecular organic compound having a molecular weight of less than 5,000 and which has a solublity of less than 1 g in 100 g of pure water at 25.degree. C. in a solvent which is a poor solvent for at least one of the organic compounds and is a good solvent for the rest of the organic compounds to form a solution, and (b) applying the heated solution on a substrate and evaporating the solvent off to form an ink-receiving layer.
A method for producing a recording medium having (1) a substrate and (2) an ink-receiving layer constituted of plural layers formed on the substrate, the uppermost layer of said ink-receiving layer comprising a water-soluble high molecular organic compound having a molecular weight of not less than 5,000, and a water-insoluble low-molecular organic compound having a molecular weight of less than 5,000, said method comprising the steps of (a) forming a lower ink-receiving layer on a substrate;
- (b) dissolving a plurality of organic compounds comprising a water-soluble high molecular organic compound having a molecular weight of not less than 5,000, which has a solubility of not less than 10 g in 100 g of pure water at 25.degree. C., and a water-insoluble low-molecular organic compound having a molecular weigh of less than 5,000 and which has a solubility of less than 1 g in 100 g of pure water at 25.degree. C. in a first solvent which is a good solvent in common for all of the organic compounds to form a solution, applying the solution on the lower ink-receiving layer and evaporating the first solvent off to form an uppermost ink-receiving layer;
- and then (c) applying onto the uppermost ink-receiving layer a second solvent which is a poor solvent for at least one of the organic compounds and is a good solvent for the rest of the organic compounds and evaporating off the second solvent.
A method for producing a recording medium having (1) a substrate and (2) an ink-receiving layer constituted of plural layers formed on the substrate, the uppermost layer of said ink-receiving layer comprising a water-soluble high molecular organic compound having a molecular weight of not less than 5,000, and a water-insoluble low-molecular organic compound having a molecular weight of less than 5,000, said method comprising (a) forming a lower ink-receiving layer on a substrate;
- and (b) dissolving with heating a plurality of organic compounds comprising a water-soluble high molecular organic compound having a molecular weight of not less than 5,000, and which has a solubility of not less than 10 g in 100 g of pure water at 25.degree. C., and a water-insoluble low-molecular organic compound having a molecular weight of less than 5,000 and which has a solubility of less than 1 g in 100 g of pure water at 25.degree. C. in a solvent which is a poor solvent for at least one of the organic compounds and is a good solvent for the rest of the organic compounds to form a solution, applying the heated solution onto the lower ink-receiving layer and evaporating the solvent off to form an uppermost ink-receiving layer.
Dependencies are inferred from the claim text.