Patent ID: 7288142

Claim:
A black dyes composition for ink-jet printing inks, comprising: (A) a compound of the following formula (I) wherein R 1 is —SO 2 CH═CH 2 or —SO 2 CH 2 CH 2 OH; M is H, Na, or Li; (B) a compound of the following formula (II) wherein R 1 and M are defined as above; and (C) a compound of the following formula (III) wherein R 1 and M are defined as above, wherein said R 1 of the formula (I) is —SO 2 CH═CH 2 or SO 2 CH 2 CH 2 OH; wherein said R 1 of the formula (II) is —SO 2 CH═CH 2 or SO 2 CH 2 CH 2 OH; and, wherein said R 1 of the formula (III) is —SO 2 CH═CH 2 or SO 2 CH 2 CH 2 OH.