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Relevant academic research and scientific papers

TRISAZO COMPOUND, INK COMPOSITION, RECORDING METHOD AND COLORED MATTER

The present invention relates to a trisazo compound represented by the following formula (1) or a salt thereof, (wherein, the group A is a substituted phenyl group, the group B and the group C are substituted para-phenylene groups, R1 represent

AZO COMPOUND, INK COMPOSITION, RECORDING METHOD AND COLORED MATTER

The present invention relates to an azo compound represented by the following formula (1) [KA 1] (wherein, each of R1 and R2 independently represents a hydrogen atom, a halogen atom, a cyano group, a carboxyl group, a sulfo group, a

AZO COMPOUND, INK COMPOSITION AND COLORING MATERIAL

[Problems] A compound of a black ink which has such excellent fastnesses of a recorded article as light fastness, ozone gas fastness and moisture fastness, excellent solubility, and storage stability as a recording liquid, when used for inkjet recording a

Tetrakisazo Compound, Coloring Matter for Recording, Ink Composition and Colored Article

The present invention relates to black coloring matter, and relates to a compound represented by the following formula (1): (wherein A and D independently represent an optionally substituted phenyl group or naphthyl group, respectively, and m and n represent 1 or 2, respectively), and the coloring matter for recording and an ink comprising the same. Said compound exhibits high solubility in a medium containing water as a main component, is stable even when an aqueous dye solution or an ink having a high concentration is prepared therefrom and is stored for a long period of time, has low color rendering property, exhibits colorless and neutral black, provides a printed image having high density and also provides a black recorded image being excellent in moisture fastness, light fastness and an ozone gas fastness, and further can be synthesized easily and can be produced at a low cost.

TRISAZO COMPOUND, INK COMPOSITION, AND COLORED OBJECT

[PROBLEMS] To provide: a black compound which is for use in ink-jet recording or writing utensils, is excellent in ozone resistance, light resistance, moisture resistance, and color rendering, and gives a recording fluid having satisfactory storage stabil