# US 8,783,841 B2 · Image forming method

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,783,841 B2
- Document ID: US8783841B2
- Status: Granted
- Kind: B2
- Application number: 12/765,447
- Filed: 2010-04-22
- Published: 2010-11-25
- Granted: 2014-07-22
- Earliest claimed: 2009-05-20
- Assignees: Canon Kabushiki Kaisha
- Applicants: Hiroshi Taniuchi
- Inventors: Hiroshi Taniuchi
- Web page: https://patentgrep.com/patent/US8783841B2

## CPC

- B41J 3/546: {Combination of different types, e.g. using a thermal transfer head and an inkjet print head}
- B41J 2/0057: {where an intermediate transfer member receives the ink before transferring it on the printing material}
- B41M 7/0018: {using ink-fixing material, e.g. mordant, precipitating agent, after printing, e.g. by ink-jet printing, coating or spraying}
- B41M 5/0256: {the transferable ink pattern being obtained by means of a computer driven printer, e.g. an ink jet or laser printer, or by electrographic means}
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P)

## Abstract

The invention provides an image forming method having a step of applying an ink containing a coloring material to a recording medium by an ink jet recording system and a step of applying a reaction liquid which reacts with the ink to the recording medium, in which the ink is brought into contact with the reaction liquid on the recording medium, thereby forming an image, wherein the reaction liquid contains an oil and fat component having an iodine value of 100 or more.

## Claims

### Claim 1

An image forming method comprising:
a step of applying a water-based ink containing a coloring material to a recording medium by an ink jet recording system, wherein a solid content of the ink is 5% by mass or more and 10% by mass or less; and
a step of applying a reaction liquid to the recording medium on which the ink is applied, the reaction liquid reacting with the ink,
wherein the ink is brought into contact with the reaction liquid on the recording medium, thereby forming an image, and wherein the reaction liquid contains water and an oil and fat component having an iodine value of 100 or more,
wherein an amount of the oil and fat component is 0.05% by mass or more and 10.00% by mass or less based on the total mass of the reaction liquid, and
wherein the ratio of an application amount of the reaction liquid to an application amount of the ink is from ½ to 1/10.

### Claim 2 (depends on 1)

The image forming method according to claim 1, wherein the oil and fat component is contained in a form of an emulsion.

### Claim 3 (depends on 1)

The image forming method according to claim 1, wherein the reaction liquid contains an aggregating component which aggregates the coloring material.

### Claim 4 (depends on 1)

The image forming method according to claim 1, wherein the coloring material is a pigment.

### Claim 5 (depends on 1)

The image forming method according to claim 1, wherein the recording medium is an intermediate transfer medium, and an image formed on the intermediate transfer medium is transferred to a second recording medium other than the intermediate transfer medium.

### Claim 6

An image forming apparatus comprising:
an ink application unit for applying a water-based ink containing a coloring material to a recording medium by an ink jet recording system, wherein a solid content of the ink is 5% by mass or more and 10% by mass or less; and
a reaction liquid application unit for applying a reaction liquid to the recording medium on which the ink is applied, the reaction liquid reacting with the ink,
wherein the ink is brought into contact with the reaction liquid on the recording medium, thereby forming an image, and wherein the reaction liquid contains water and an oil and fat component having an iodine value of 100 or more,
wherein an amount of the oil and fat component is 0.05% by mass or more and 10.00% by mass or less based on the total mass of the reaction liquid, and
wherein the ratio of an application amount of the reaction liquid to an application amount of the ink is from ½ to 1/10.

### Claim 7 (depends on 6)

The image forming apparatus according to claim 6, wherein the oil and fat component is contained in a form of an emulsion.

### Claim 8 (depends on 6)

The image forming apparatus according to claim 6, wherein the reaction liquid contains an aggregating component which aggregates the coloring material.

### Claim 9 (depends on 6)

The image forming apparatus according to claim 6, wherein the coloring material is a pigment.

### Claim 10 (depends on 6)

The image forming apparatus according to claim 6, wherein the recording medium is an intermediate transfer medium, and an image formed on the intermediate transfer medium is transferred to a second recording medium other than the intermediate transfer medium.

### Claim 11 (depends on 6)

The image forming apparatus according to claim 6, wherein the oil and fat component is at least one of linseed oil, tung oil, perilla oil, evening primrose oil, sesame oil, rapeseed oil, cotton-seed oil, soybean oil, wheat germ oil and sweet almond oil.

### Claim 12 (depends on 1)

The image forming method according to claim 1, wherein the oil and fat component is at least one of linseed oil, tung oil, perilla oil, evening primrose oil, sesame oil, rapeseed oil, cotton-seed oil, soybean oil, wheat germ oil and sweet almond oil.