| abstract |
An additive for a printing ink comprising a wax of either an ethylene homopolymer or ethylene•C 3-20 α-olefin copolymer each has an intrinsic viscosity, weight-average molecular weight/number-average molecular weight ratio, z-average molecular weight/weight-average molecular weight ratio, density, penetration hardness, and acid value in specific ranges; a solvent dispersion obtained by dispersing the wax; and a printing ink containing the wax. |