Patent ID: 7465346

Claim:
A black ink composition comprising a colorant represented by Formula 1 below and a colorant represented by Formula 2 below: wherein R 1 represents either a halogen atom, H, SO 3 M or COOM, R 2 and R 3 each independently represent H, SO 3 M or COOM, and M represents Li or Na, with the proviso that, a structure in which both R 2 and R 3 are H is excluded therefrom; A 1 -N═N-A 2 -N═N-A 3 FORMULA 2 wherein A 1 is a substituent represented by Formula 3 or Formula 4 below, A 2 is a substituent represented by Formula 5 or Formula 6 below, and A 3 is a substituent represented by Formula 7 below; wherein M represents Li or Na; wherein M represents Li or Na; wherein M represents Li or Na.