Recording liquid, recording cartridge, recording method, recording apparatus and recording medium

Abstract

A recording liquid comprising a coloring agent and water, wherein the recording liquid containing a polyol (A) having a solubility in water at 20° C. of 0.2 wt. % or more and not more than 4.5 wt. %, and at least one compound (B) selected from a group consisting of compound represented by formula (1) R ,R ,R .N→O (where R and R are an alkyl group or a hydroxyalkyl group having 1 to 3 carbon atoms, and R is an alkyl group or an alkenyl group having 10 to 20 carbon atoms), and of compound represented by formula (2) represented by R ,R ,R .N—CH —CO—O (where R and R are an alkyl group or hydroxyalkyl group having 1 to 3 carbon atoms, and R is an alkyl group or alkyl group derived from cocoanut oil having 10 to 16 carbon atoms that may contain an amide group). The recording liquid shows synergistic effect including a high permeability with modified penetrating property capable of eliminating an increasing in optical density at backside-surface of printing medium, anti-color bleeding property, and an effect on reduction of blurring of colors, by combination use of the polyol (A) and compound (B). The polyol (A) has a small molecular weight so that the adsorbing speed onto the surface to be printed is very high, and has a property to render the nitrogen moiety of the compound (B) into positive charge. The compound (B) effectuates on compound (A) to make it to be insoluble.