Water-soluble phthalocyanine compound-containing ink for ink...

C - Chemistry – Metallurgy – 09 – B

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C09B 47/26 (2006.01) C07D 487/22 (2006.01) C09B 47/06 (2006.01) C09B 47/067 (2006.01) C09B 47/22 (2006.01) C09B 47/24 (2006.01) C09B 67/00 (2006.01) C09B 67/22 (2006.01) C09D 11/00 (2006.01) C09D 11/02 (2006.01) G03G 9/09 (2006.01) G11B 7/24 (2006.01) G11B 7/248 (2006.01)

Patent

CA 2473962

To provide an ink capable of giving an image having excellent (color) hue and high fastness to light and ozone gas, an ink for ink jetting containing the ink, an ink jet recording method, and a method for enhancing the ozone resistance of an image. An ink comprising a water-soluble phthalocyanine compound, wherein in the spectral absorption curve of an aqueous solution of the phthalocyanine compound, the absorbance ratio b/a of the maximum absorbance b in the absorption band of 660 to 680 ran and the maximum absorbance a in the absorption band of 600 to 640 ran is less than 0.8 and the counter ion for the ionic hydrophilic group of the phthalocyanine compound is lithium ion.

L'invention concerne une encre permettant de produire une image qui présente une excellente teinte (couleur) et une solidité élevée à la lumière et à l'ozone, une encre pour impression à jet d'encre contenant cette encre, un procédé d'impression à jet d'encre et un procédé pour renforcer la résistance à l'ozone d'une image. L'encre contient un composé de phtalocyanine soluble dans l'eau. Dans la courbe d'absorption spectrale d'une solution aqueuse du composé de phthalocyanine, le rapport d'absorbance b/a entre l'absorbance maximum b dans la bande d'absorption comprise entre 660 et 680 nm, et l'absorbance maximum a dans la bande d'absorption comprise entre 600 et 640 nm, est inférieur à 0,8 et le contre-ion du groupe hydrophile ionique du composé phtalocyanine est l'ion lithium.

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