| abstract |
A marking composition comprising an infrared absorbing particulate component and a carbon derivative, wherein the weight ratio of infrared absorbing component to carbon derivative ranges from 100: 1 to 10,000: 1, wherein the infrared absorbing component is selected from inorganic oxides of the oxides, sulfides and Selenides of tin, zinc, antimony, molybdenum, tungsten, bismuth and their mixed compounds, wherein tin oxides are selected from antimony-doped tin oxide and fluorine-doped tin oxide, and wherein the carbon derivative is selected from carbon blacks, graphite, fullerenes, graphenes and carbon nanotubes , their derivatives and mixtures thereof. |