Jet printing ink

Claim 1

In a process for information recording comprising producing a fine jet of colored aqueous liquid containing at least one direct dye, directing the jet of colored liquid onto a recording medium, modulating the density of the applied jet by an electric field in accordance with the information to be recorded, the improvement comprising the presence as a humectant of an effective amount of at least one water-soluble acetylenic compound exhibiting the structural formula. ##STR3## in which each of R 1 and R 2 may be substituents selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, hydroxy-substituted and alkoxy-substituted alkyl, alkenyl, and alkynyl groups, and R 1 and R 2 may together be a carbonyl oxygen; R 3 may be a substituent of the group consisting of hydrogen, halogen, alkyl, alkenyl, alkynyl, hydroxy-substituted and alkoxy-substituted alkenyl and alkynyl groups, and substituted-alkyl groups having the formula: ##STR4## in which each of R 4 and R 5 may be substituents selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, and hydroxy-substituted and alkoxy-substituted alkyl, alkenyl, and alkynyl groups, and when R 1 and R 2 together are carbonyl oxygen, R 3 may be an aryl group, including hydroxy and alkoxy and alkyl-substituted aryl; each of R.sub.α and R.sub.α' may be substituents selected from the group consisting of hydroxy, alkoxy, carboxy-substituted alkoxy, formoxy, alkanoxy, halogen and polyoxy groups.