Article, ink recording medium, ink-jet recording medium and production process thereof

An article comprising a microporous site containing at least one selected from a compound represented by a general formula (I) and a compound represented by a general formula (II), and a diffusible sulfinic compound

• wherein R1 and R2 are individually hydrogen, a substituted or unsubstituted and linear, branched or cyclic alkyl group (having 1 to 30 carbon atoms), an alkoxy group (having 1 to 20 carbon atoms), a substituted or unsubstituted aryl group (having 6 to 30 carbon atoms), a mono- or di-substituted amino group (the substituent group(s) being an alkyl, acyl or alkenyl group having 1 to 20 carbon atoms), sulfide, disulfide, an amide group, an ester group, an alkenyl group, a hydroxyl group, or a substituted or unsubstituted ureido group (having 1 to 20 carbon atoms) and may form a bis form, with the proviso that both R1 and R2 are not hydrogen at the same time, at least one of R1 and R2, which is not hydrogen, is located at an o-position, and these functional groups may have an additional substituent, R3 is a substituted or unsubstituted and saturated and unsaturated alkylene group having 1 to 30 carbon atoms, a carbonyl group or a thiocarbonyl group, and R4 is a saturated alkyl, alkoxy or alkenyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aryloxy, alkylamino or amino group, with the proviso that these functional groups may be substituted by a hydroxy, amino, carboxyl, alkoxy, alkenyl or alkyl group,
• wherein R1 and R2 are individually hydrogen, a substituted or unsubstituted and linear, branched or cyclic alkyl group (having 1 to 30 carbon atoms), an alkoxy group (having 1 to 20 carbon atoms), a substituted or unsubstituted aryl group (having 6 to 30 carbon atoms), a mono- or di-substituted amino group (the substituent group(s) being alkyl, acyl or alkenyl group having 1 to 20 carbon atoms), sulfide, disulfide, an amide group, an ester group, an alkoxy group, an alkenyl group, a hydroxyl group, or a substituted or unsubstituted ureido group (having 1 to 20 carbon atoms) and may form a bis form, with the proviso that both R1 and R2 are not hydrogen at the same time, at least one of R1 and R2, which is not hydrogen, is located at an o-position, and these functional groups may have an additional substituent, and R3 is a saturated alkyl, alkoxy or alkenyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aryloxy, alkylamino or amino group, with the proviso that these functional groups may be substituted by a hydroxy, amino, carboxyl, alkoxy, alkenyl or alkyl group.