Abstract: A resin composition having laser marking properties from a NdYAG radiation laser wherein said composition comprises a polyester thermoplastic resin, a sufficient amount of light pigment for forming a light background coloration, and an effective amount of marking agent wherein said polyester thermoplastic resin decomposes in laser struck areas to form dark colored markings in laser struck areas on the light background coloration wherein the marking agent is selected from the group consisting of boron phosphate, zinc oxide, zinc stannate, zinc hydroxy stannate, tin (II) oxalate and mixtures thereof.