# US 2013/0155144 A1 · Inkjet recording method

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- Number: US 2013/0155144 A1
- Document ID: US20130155144A1
- Status: Published application
- Kind: A1
- Application number: 13/712,853
- Filed: 2012-12-12
- Published: 2013-06-20
- Earliest claimed: 2011-12-15
- Assignees: Canon Kabushiki Kaisha
- Inventors: Noboru Kunimine; Takao Ogata
- Web page: https://patentgrep.com/patent/US20130155144A1

## CPC

- B41J 2/07: characterised by jet control (B41J2/205 takes precedence)
- C09D 11/324: containing carbon black
- C09D 11/40: Ink-sets specially adapted for multi-colour inkjet printing
- H04N 1/58: Edge or detail enhancement; Noise or error suppression, e.g. colour misregistration correction (H04N1/62 takes precedence)
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

An inkjet recording method includes applying a pigment-containing first black ink to a recording medium to record an edge region of an image, and applying a pigment-containing second black ink to the recording medium to record an inner region of the image. A dynamic surface tension γ1 of the first black ink determined by a maximum bubble pressure method for a lifetime of 100 ms and a dynamic surface tension γ2 of the second black ink determined by a maximum bubble pressure method for a lifetime of 100 ms satisfy relationships of condition (1) of γ1>γ2, condition (2) of γ1−γ2≦20 mN/m, condition (3) of 40 mN/m≦γ1, and condition (4) of 34 mN/m≦γ2.

## Claims

### Claim 1

An inkjet recording method comprising:
a step of applying a pigment-containing first black ink through an inkjet recording head to a recording medium to record an edge region of an image; and
a step of applying a pigment-containing second black ink through an inkjet recording head to the recording medium to record an inner region of the image,
wherein a dynamic surface tension γ1 of the first black ink determined by a maximum bubble pressure method for a lifetime of 100 ms and a dynamic surface tension γ2 of the second black ink determined by a maximum bubble pressure method for a lifetime of 100 ms satisfy relationships of condition (1) of γ1>γ2, condition (2) of γ1−y2≦20 mN/m, condition (3) of 40 mN/m≦y1, and condition (4) of 34 mN/m≦γ2.

### Claim 2 (depends on 1)

The inkjet recording method according to claim 1, wherein the dynamic surface tension γ2 of the second black ink further satisfies condition (5) of γ2≦45 mN/m.

### Claim 3 (depends on 1)

The inkjet recording method according to claim 1, wherein the second black ink contains at least one selected from linear α,β-alkanediols whose alkyl groups have 5 or more carbons.