Water-based magenta ink composition and method of ink-jet...

C - Chemistry – Metallurgy – 09 – B

Patent

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C09B 5/14 (2006.01) B41J 2/01 (2006.01) C09D 11/00 (2006.01) C09D 11/02 (2006.01) D06P 5/30 (2006.01)

Patent

CA 2322529

The present invention relates to a water-based magenta ink composition which has satisfactory storage stability, has a hue and vividness suitable for ink- jet recording, and gives prints having high fastness to light and water, and magenta dye suitable therefore. More particularly, the present invention relates to a water-based magenta ink composition characterized by containing disulfonic acid derivative of a compound represented by Formula(2) Image or the salt thereof as the dye component, an ink- jet recording method using said composition, and magenta dye containing little inorganic salt and little mono-sulfonic acid compound and being suitable for the said composition.

L'invention concerne une composition d'encre magenta à base aqueuse présentant une stabilité au stockage satisfaisante, une teinte et une clarté appropriées pour l'impression par jet d'encre et permettant d'obtenir des impressions possédant une solidité à la lumière et à l'eau plus élevée. L'invention concerne également un colorant magenta approprié. La composition magenta à base aqueuse se caractérise par le fait qu'elle contient comme colorant un acide bisulfonique de la composition représentée par la formule (2) ou un sel de cet acide. L'invention concerne en outre un procédé d'impression par jet d'encre avec la composition. La teneur en acides monosulfoniques et en sels métalliques inorganiques est réduit dans le colorant magenta, ce qui rend son utilisation appropriée dans la composition d'encre.

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