Patent ID: 7812171

Claim:
A black pigment consisting of an oxonol compound having a mean particle diameter ranging from 0.01 to 10.0 micrometers, wherein said compound is a compound denoted by general formula (I) wherein, R 11 and R 14 each independently denotes a hydrogen atom, an aliphatic group, an aromatic group, or a heterocyclic group bonded through a carbon atom; R 12 and R 15 each independently denotes a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group bonded through a carbon atom, —COR 17 , or —SO 2 R 17 , R 17 denotes an aliphatic group, an aromatic group, or a heterocyclic group bonded through a carbon atom; R 13 and R 16 each independently denotes a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, a cyano group, —CO 2 R 19 , —OR 19 , —NR 19 R 20 , —N(R 19 )COR 18 , —CONR 18 R 19 , or —N(R 19 )CONR 20 R 21 , R 18 denotes an aliphatic group, an aromatic group, or a heterocyclic group bonded through a carbon atom, R 19 , R 20 , and R 21 each independently denote a hydrogen atom, an aliphatic group, an aromatic group, or a heterocyclic group bonded through a carbon atom; n11 denotes 1 or 2; M 11 denotes a calcium ion or a magnesium ion; and n12 denotes an inverse number of the valence of M 11 , and wherein a black pigment dispersion comprising the black pigment has a transmittance of light having a wavelength of 750 to 1,200 nm in a range of 60 to 100 percent.