Water-based black ink composition and colored material

Details Water-based black ink composition and colored material Water-based black ink composition and colored material

C - Chemistry, Metallurgy

09

B

C09B 33/28 (2006.01) B41J 2/01 (2006.01) C09B 29/08 (2006.01) C09B 33/18 (2006.01) C09B 67/22 (2006.01) C09D 11/00 (2006.01)

Patent

CA 2518413

[Problems] To provide a black compound for ink-jet recording and for writing tools and having excellent in ozone gas fastness, light fastness, moisture fastness and color rendering properties, and as a recording liquid, storage stability is excellent and an ink composition containing thereto. [Solving Means] An ink composition containing an azo compound represented by the following Formula (1) and a salt thereof. (see formula ka1) (see formula 1)

L'invention concerne une composition d'encre noire à base d'eau comprenant un colorant noir hydrosoluble faisant preuve d'une résistance à l'ozone (A) et un composé condensé (B) provenant de l'acide 4,4'-dinitrostilbène-2,2'-acide disulfonique et d'aminobenzènes ou un produit de réduction (C) du composé (B). Cette composition d'encre se prête à une utilisation dans l'enregistrement à jet d'encre, et permet d'une tonalité neutre et obtenir un noir à forte densité d'impression. Par ailleurs, l'impression obtenue est excellente en termes de résistance au gaz d'ozone, de solidité à la lumière, de résistance à l'humidité et de rendu des couleurs. La stabilité au stockage sous forme de liquide d'enregistrement de la composition d'encre est excellente.

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