Light-stabilized ink compositions

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 ##STR9## wherein R.
sub.
1 is hydrogen, C.
sub.
1 -C.
sub.
4 alkyl, a group --R.
sub.
4 --SO.
sub.
3 M or --R.
sub.
4 --CO.
sub.
2 M, R.
sub.
2, if R.
sub.
1 is H or C.
sub.
1 -C.
sub.
4 alkyl, is a --SO.
sub.
3 M group and, if R.
sub.
1 is --R.
sub.
4 --CO.
sub.
2 M or --R.
sub.
4 --SO.
sub.
3 M, is H or --SO.
sub.
3 M, R.
sub.
3 is hydrogen, R.
sub.
4 is unsubstituted or OH-substituted C.
sub.
1 -C.
sub.
4 alkylene, X and Y are each independently of the other a group of formula II or III ##STR10## wherein R.
sub.
5 is hydrogen, C.
sub.
1 -C.
sub.
4 alkyl, --R.
sub.
4 --CO.
sub.
2 M or --R.
sub.
4 --SO.
sub.
3 M R.
sub.
6 is hydrogen, Cl, C.
sub.
1 -C.
sub.
4 alkyl or --SO.
sub.
3 M, R.
sub.
7 is hydrogen, R.
sub.
8, R.
sub.
9 and R.
sub.
10 are each independently of one another H, Cl, C.
sub.
1 -C.
sub.
4 alkyl, phenyl or --SO.
sub.
3 M, and M is hydrogen, Li, Na, K, 1/2Ca, 1/2Mg, 1/2Zn, 1/2Co(II), 1/2Cu(II), 1/2Ni(II), 1/3Cr(III), 1/3Fe(III), ##STR11## wherein R.
sub.
11, R.
sub.
12, R.
sub.
13 and R.
sub.
14 are each independently of one another H, C.
sub.
1 -C.
sub.
12 alkyl, 2-hydroxyethyl, cyclohexyl, phenyl or benzyl, 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, either a) R.
sub.
1 is hydrogen, methyl or ethyl and R.
sub.
2 is --SO.
sub.
3 M, or b) R.
sub.
1 is --R.
sub.
4 --SO.
sub.
3 M or --R.
sub.
4 --CO.
sub.
2 M and R.
sub.
2 is hydrogen, R.
sub.
3 is hydrogen, R.
sub.
4 is unsubstituted or OH-substituted C.
sub.
1 -C.
sub.
3 alkylene, X and Y are each independently of the other a group of formula II or III, wherein R