Pigment Black 12 (C.I. 77543) is a buff mixed oxide of iron (II) and titanium (IV) with chemical formula Fe2TiO4 and a spinel structure. It provides a buff shade, similar to PBr24, without containing Cr3+.
Pigment Brown 29 (C.I. 77500) is a complex inorganic pigment of black mixed oxide of iron (III) and chrome (III) with chemical formula (Cr, Fe)2O3 and a hematite structure. It is a brownish to bluish black pigment.
Pigment Brown 33 (C.I. 77503) is a brown mixed oxide of zinc (II), iron (II, III) and chrome (III) with chemical formula (Zn,Fe)(Fe,Cr)2O4 and a spinel structure. It provides a brown shade.
Pigment Brown 24 (C.I. 77310) is a buff chrome titanate complex inorganic pigment with a chemical formula of (Ti,Cr,Sb) O2 and rutile lattice (tetragonal) structure.