IP Library › Granted Patent US 8,277,552
Granted Patent B2
US 8,277,552 · App. 12/961,237 · Granted Oct 2, 2012

Ink set, recording apparatus, and recording method

Assignee: Seiko Epson Corporation
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Quick Facts
Patent No.
US 8,277,552
App. No.
12/961,237
Granted
Oct 2, 2012
Kind
B2
Abstract

An ink set includes a cyan ink composition containing C. I. Pigment Blue 15:6 as a pigment; a magenta ink composition containing a quinacridone pigment or a quinacridone solid solution pigment; a light magenta ink composition containing a quinacridone pigment selected from the group consisting of C. I. Pigment Violet 19, C. I. Pigment Red 122, C. I. Pigment Red 202, and C. I. Pigment Red 209 or a quinacridone solid solution pigment composed of at least two selected from the group, the pigment concentration being lower than that of the magenta ink composition; a light cyan ink composition containing C. I. Pigment Blue 15:3 as a pigment at a pigment concentration lower than that of the cyan ink composition; an orange ink composition containing a pigment selected from the group consisting of C. I. Pigment Orange 43 and C. I. Pigment Red 242: a green ink composition containing a pigment selected from the group consisting of C. I. Pigment Green 36 and C. I. Pigment Green 7.

Claims (17)

1. An ink set comprising:

a cyan ink composition containing C. I. Pigment Blue 15:6 as a pigment;

a magenta ink composition containing a quinacridone pigment selected from the group consisting of C. I. Pigment Violet 19, C. I. Pigment Red 122, C. I. Pigment Red 202, and C. I. Pigment Red 209 or a quinacridone solid solution pigment composed of at least two selected from the group;

a yellow ink composition containing a pigment selected from the group consisting of C. I. Pigment Yellow 74, C. I. Pigment Yellow 180, and C. I. Pigment Yellow 185;

a light magenta ink composition containing a quinacridone pigment selected from the group consisting of C. I. Pigment Violet 19, C. I. Pigment Red 122, C. I. Pigment Red 202, and C. I. Pigment Red 209 or a quinacridone solid solution pigment composed of at least two selected from the group, the pigment concentration being lower than that of the magenta ink composition;

a light cyan ink composition containing C. I. Pigment Blue 15:3 as a pigment at a pigment concentration lower than that of the cyan ink composition;

an orange ink composition containing a pigment selected from the group consisting of C. I. Pigment Orange 43 and C. I. Pigment Red 242; and

a green ink composition containing a pigment selected from the group consisting of C. I. Pigment Green 36 and C. I. Pigment Green 7.

2. The ink set according to claim 1 , wherein the pigment contained in at least one of the magenta ink composition and the light magenta ink composition is a quinacridone solid solution pigment composed of at least two selected from the group consisting of C. I. Pigment Violet 19, C. I. Pigment Red 122, C. I. Pigment Red 202, and C. I. Pigment Red 209.

3. The ink set according to claim 2 , wherein the pigment contained in at least one of the magenta ink composition and the light magenta ink composition is a quinacridone solid solution pigment composed of C. I. Pigment Violet 19 and C. I. Pigment Red 202.

4. The ink set according to claim 3 , wherein in the quinacridone solid solution pigment, the mass of C. I. Pigment Violet 19 is larger than the mass of C. I. Pigment Red 202.

5. The ink set according to claim 3 , wherein in the quinacridone solid solution pigment, the mass ratio of C. I. Pigment Violet 19/C. I. Pigment Red 202 is 70/30 to 50/50.

6. The ink set according to claim 1 , wherein C. I. Pigment Violet 19 contained in the quinacridone solid solution pigment is γ-type.

7. The ink set according to claim 1 , wherein the pigment concentration of each of the light magenta ink composition and the light cyan ink composition is 2% by mass or less.

8. The ink set according to claim 7 , wherein the pigment concentration of the light cyan ink composition is 1.3 to 2% by mass or less.

9. A recording apparatus comprising the ink set according to claim 1 .

10. A recording method utilizing the ink set according to claim 1 .

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 25, 2012
From: SHIONO, SHOHEI; SANO, TSUYOSHI
To: SEIKO EPSON CORPORATION
Reel/Frame 028270/0775 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 6, 2010
From: SHIONO, SHOHEI
To: SEIKO EPSON CORPORATION
Reel/Frame 025457/0565 →
Priority Claims (1)
JP 2009-276333 · Dec 4, 2009 · national
Continuity (1)
Related Publication 20110132228A1 · Jun 9, 2011