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Inkjet inks having cyan, yellow, magenta, and/or black colorants and methods of using the same to produce black and while images

An inkjet ink, blue-green technology, applied in the field of inkjet ink, can solve the problem of high resolution

Inactive Publication Date: 2005-02-02
HEWLETT PACKARD DEV CO LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, the resolution of this black-and-white image is not as high as that of a black-and-white photo, as some isolated spots of colored inkjet ink can sometimes be seen with the naked eye, especially in the light areas of the image

Method used

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  • Inkjet inks having cyan, yellow, magenta, and/or black colorants and methods of using the same to produce black and while images

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 Inkjet Ink with Neutral Gray Shades for Printing

[0034] Four inkjet inks were produced according to the amounts (% by weight) of black, cyan and red pigments listed in Table 1. The black pigment is CAB-O-JET  200, blue-green pigment is CAB-O-JET  250, the red pigment is CAB-O-JET  260, the yellow pigment is CAB-O-JET  270, both products of Cabot Corp. (Boston, MA).

[0035] the ink

dark gray

medium gray

light grey

very light gray

Black pigment, %

2.75

0.60

0.29

0.14

Blue-green pigment, %

0

0.16

0.07

0.03

Red pigment, %

0

0.04

0.01

0.01

total

2.75

0.80

0.37

0.18

[0036] Pigments are dispersed in the ink vehicle by conventional methods. The inkjet ink also included 9% 2-pyrrolidone, 2% 1,2-hexanediol, 3% aliphatic ketoglycolic acid glycol (LEG-1), 0.2% Surfynol 104...

Embodiment 2

[0038] Example 2 Inkjet Ink with Cool Gray Shades Used in Printing

[0039] Four inkjet inks were produced according to the amounts (% by weight) of black, cyan and red pigments listed in Table 2. The pigments used in the inkjet ink were the same as described in Example 1.

[0040] the ink

dark gray

medium gray

light grey

very light

Black pigment, %

2.75

0.60

0.29

0.14

Blue-green pigment, %

0

0.18

0.08

0.04

Red pigment, %

0

0.03

0.01

0.01

total

2.75

0.81

0.38

0.19

[0041] Pigments are dispersed in the ink vehicle by conventional methods. The inkjet ink also included 9% 2-pyrrolidone, 2% 1,2-hexanediol, 3% aliphatic ketoglycolic acid glycol (LEG-1), 0.2% Surfynol 104 and 0.2% Proxel.

[0042] All four of these inkjet inks produced cool gray tones when printing on heavy-duty coated paper. ...

Embodiment 3

[0043] Example 3 Inkjet Ink with Warm Gray Shades for Printing

[0044] Four inkjet inks were produced with the amounts of black, cyan, and red pigments listed in Table 3. The pigments used in the inkjet ink were the same as described in Example 1.

[0045] the ink

dark gray

medium gray

light grey

very light gray

Black pigment, %

2.75

0.60

0.29

0.14

Blue-green pigment, %

0

0.14

0.06

0.02

Red pigment, %

0

0.07

0.03

0.03

total

2.75

0.81

0.38

0.19

[0046] Pigments are dispersed in the ink vehicle by conventional methods. The inkjet ink also included 9% 2-pyrrolidone, 2% 1,2-hexanediol, 3% aliphatic ketoglycolic acid glycol (LEG-1), 0.2% Surfynol 104 and 0.2% Proxel.

[0047] All four of these inkjet inks produced warm gray tones when printing on heavy-duty coated paper.

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PUM

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Abstract

A gray inkjet ink having a black colorant and at least one cyan, magenta, or yellow colorant. By adjusting the amount of cyan, magenta, or yellow colorant in the inkjet ink, a gray inkjet ink having a neutral, warm, cool, or sepia tone is produced. At least one gray inkjet ink is used in a black ink set or an eight-color ink set to produce black and white images having high resolution. Methods of producing black and white images having desired gray tones are also disclosed.

Description

technical field [0001] The present invention relates to inkjet inks with cyan, red, yellow or black colorants in the ink vehicle. This inkjet ink can be used to produce neutral, cool, warm and sepia shades of gray. technical background [0002] Black and white images with high resolution, like black and white photos, are becoming fashionable. Statistics show that among the total number of images produced each year, photographers continue to use traditional silver halide technology to obtain a small proportion of black and white photos, and photographers have also accepted the use of inkjet printing technology to obtain high-resolution black and white images. Color inkjet printers and mixed-color inkjet inks print black and white images on print media. Color inkjet printers mix cyan, red, yellow, and black inkjet inks on the print media to form a composite black. Inkjet inks of cyan, red, yellow, and black are mixed in different proportions on the print media to produce sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/01B41J2/21B41M5/00C09D11/00
CPCC09D11/40
Inventor J·A·莫特D·泰沃尔
Owner HEWLETT PACKARD DEV CO LP
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