Patent ID: 7387667

Claim:
A black dye composition, comprising: (a) a compound of the following formula (I), wherein R 1 is —SO 2 CH 2 CH 2 OSO 3 H—SO 2 CH 2 CH 2 OH, —SO 2 CH═CH 2 , or —SO 3 H; R 2 and R 3 each independently is —SO 3 H, —CH 3 , —OCH 3 , or H; (b) a compound of the following formula (II), wherein R 4 is —Cl, —OH, —NH 2 , —NHCH 2 CH 2 OH, or —N(CH 2 CH 2 OH) 2 ; and (c) a compound of the following formula (III), wherein, R 4 is defined as above; wherein the compound (I) of the component (a) is 25%˜98% by weight; the compound (II) of the component (b) is 1%˜35% by weight; and the compound (III) of the component (c) is 1%˜40% by weight.