Coloring matter consisting of trisazo compound, ink compositions, recording method, and colored body
AssigneeNippon Kayaku Kabushiki Kaisha
InventorsTakashi Yoshimoto, Noriko Kajiura
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AssigneeNippon Kayaku Kabushiki Kaisha
InventorsTakashi Yoshimoto, Noriko Kajiura
Estimating the term…
A coloring matter for black ink which is highly soluble in water-based media, and ink compositions containing the same. The ink compositions can produce black recorded images which exhibit excellent fastness and ozone gas fastness. The coloring matter consists of at least one trisazo compound represented by general formula (1), tautomers thereof, and salts of both. In general formula (1), R1 is unsubstituted C1-4 alkyl or the like; R2 is cyano or the like; R3 is a chlorine atom or the like; R5 to R7 are a hydrogen atom, unsubstituted C1-4 alkyl, sulfo-substituted C1-4 alkoxy, or the like; R8 to R10 are a hydrogen atom, unsubstituted C1-4 alkyl, sulfo-substituted C1-4 alkylthio, or the like; A is sulfo-substituted 2-naphthothiazolyl or the like; and a to d represent the positions at which the ring is substituted with R3 and sulfo.
A coloring matter consisting of at least one trisazo compound represented by the following formula (1) or a tautomer of the same, or a salt thereof
Dependencies are inferred from the claim text.