Ink, ink set, ink cartridge, recording unit, image recording apparatus and image recording method
First Claim
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1. A process for alleviating bleeding between a black image and a color image adjoining each other on a recording medium, both of the images being formed on the recording medium by an ink jet process, comprising the steps of:
- (i) applying a black ink comprising a self-dispersing carbon black to an area where the black image is to be formed; and
(ii) applying a color ink to an area where the color image is to be formed, wherein the black ink further contains at least one salt selected from the group consisting of (M1)2SO4, CH3COO(M1), Ph—
COO(M1), (M1)NO3, (M1)Cl, (M1)Br, (M1)I, (M1)2SO3 and (M1)2CO3, where M1 is an alkali metal, ammonium or organo-ammonium and Ph is a phenyl group.
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Abstract
Provided is a black ink capable of mitigating the dependency on image quality of recording media and giving a high quality image stably, which comprises at least one salt selected from the group consisting of (M1)2SO4, CH3COO(M1), Ph_COO(M1), (M1)NO3, (M1)Cl, (M1)Br, (M1)I, (M1)2SO3 and (M1)2CO3, where M1 is an alkali metal, ammonium or organo-ammonium and Ph is a phenyl group, and a self dispersible carbon black.
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Citations
5 Claims
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1. A process for alleviating bleeding between a black image and a color image adjoining each other on a recording medium, both of the images being formed on the recording medium by an ink jet process, comprising the steps of:
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(i) applying a black ink comprising a self-dispersing carbon black to an area where the black image is to be formed; and
(ii) applying a color ink to an area where the color image is to be formed, wherein the black ink further contains at least one salt selected from the group consisting of (M1)2SO4, CH3COO(M1), Ph—
COO(M1), (M1)NO3, (M1)Cl, (M1)Br, (M1)I, (M1)2SO3 and (M1)2CO3, where M1 is an alkali metal, ammonium or organo-ammonium and Ph is a phenyl group.- View Dependent Claims (2, 3, 4, 5)
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Specification