RECORDING SOLUTION FOR INK-JET

摘要

PROBLEM TO BE SOLVED: To obtain the subject recording solution capable of developing excellent dispersion stability and delivery stability at a nozzle, by dispersing a specifically treated carbon black into an aqueous liquid. SOLUTION: This recording solution is obtained by dispersing (B) a carbon black which is prepared by dispersing a carbon black (B1 ) into a solvent (B2 ) having no reactivity such as N-methyl-2-pyrrolidone or sulfolane to sulfonic acid and treating the carbon black with a sulfonating agent (B3 ) such as a sulfonated pyridine salt or sulfamic acid into (A) an aqueous liquid. Preferably, the recording solution comprises 0.1-10wt.% of the solid content of the component B with respect to dispersibility. The component B is considered to contain a sulfonic group on the surface of its particle so that improvement in dispersibility of the component B to the component A and reduction in size of the dispersion can be actualized.