Light-stabilized ink composition

DETAILED DESCRIPTION What is claimed is: 1.
A method of stabilizing an ink jet print against the deleterious effects of light which comprises preparing an aqueous solution containing at least 30% by weight of water and (i) an effective coloring amount of a water soluble dye, and (ii) 0.
01 to 20% by weight, based on the total solution, an effective stabilizing amount, of at least one compound of formula I ##STR20## wherein R.
sub.
1 is hydrogen, halogen, C.
sub.
1 -C.
sub.
4 alkyl, C.
sub.
1 -C.
sub.
4 alkoxy, --COO--R.
sub.
9 --OSO.
sub.
3 X, --COOX or --SO.
sub.
3 X R.
sub.
2 is hydrogen, OH, C.
sub.
1 -C.
sub.
8 alkyl, C.
sub.
5 -C.
sub.
6 cycloalkyl, phenyl, naphthyl, C.
sub.
7 -C.
sub.
12 aralkyl, halogen, C.
sub.
1 -C.
sub.
8 alkoxy or a --Y--Z group, R.
sub.
3 is hydrogen, C.
sub.
1 -C.
sub.
8 alkyl, a --Y--Z group or a --Y--O--Z' group, X is hydrogen or M, M is Li, Na, K, 1/2 Mg, 1/2 Ca, 1/2 Zn, 1/2 Co (II), 1/2 Ni (II), 1/3 Cr (III), 1/3 Fe (III), ##STR21## wherein R.
sub.
4, R.
sub.
5, R.
sub.
6 and R.
sub.
7 are each independently of one another hydrogen, C.
sub.
1 -C.
sub.
12 alkyl, hydroxyethyl, cyclohexyl, phenyl or benzyl, Y is a direct bond or a divalent group of one of the following formulae: ##STR22## wherein R.
sub.
8, R.
sub.
9, R.
sub.
10 and R.
sub.
11 are each independently of one another C.
sub.
1 -C.
sub.
20 alkylene which may be substituted by 1-10 hydroxyl groups or are C.
sub.
2 -C.
sub.
20 alkylene which is interrupted by 1-10 --O-- or --NH--, and Z is a --COOX or --SO.
sub.
3 X group, and Z' is --SO.
sub.
3 X, with the proviso that the compound of formula I contains at least one group of formula --COOX or --SO.
sub.
3 X; and then applying said aqueous solution as an ink onto a recording material for ink jet printing to form an ink jet print containing an effective stabilizing amount of said compound of formula I.
2.
A method according to claim 1 where in the compound of formula I R.
sub.
1 is hydrogen, halogen, C.
sub.
1 -C.
sub.
4 alkyl, C.
sub.
1 -C.
sub.
4 alkoxy, --COO--R.
sub.
9 --OSO.
sub.
3 X, --COOX or --SO.
sub.
3 X, R.
sub.
2 is hydrogen, C