Patent ID: 7575848

Claim:
An image recording coating comprising: a substrate having a layer disposed thereon, wherein the layer includes: a matrix; a first radiation-absorbing compound that absorbs radiation energy at a first wavelength and a second wavelength, wherein the first radiation-absorbing compound has an extinction coefficient greater than about 0.5×10 5 ml*g −1 *cm −1 at the first wavelength, wherein the first wavelength is about 700 to 1000 nm and the second wavelength is about 350 to 500 nm; a shielding radiation-absorbing compound that absorbs radiation energy a the second wavelength, wherein the shielding radiation-absorbing compound has an extinction coefficient greater than or equal to about 0.1×10 5 ml*g −1 *cm −1 at the second wavelength, wherein the shielding radiation-absorbing compound is stable when exposed to radiation energy at the second wavelength, wherein the shielding radiation-absorbing compound absorbs the radiation energy at the second wavelength preferentially over the first radiation-absorbing compound; an activator; and a color former, wherein the activator and the color former react to form a mark upon absorption of radiation energy by the first radiation-absorbing compound at the first wavelength, wherein the layer includes: matrix in an amount of about 2 to 98 weight percent of the layer, the first radiation-absorbing compound in an amount of about 0.01 to 10 weight percent of the layer, the second radiation-absorbing compound in an amount of about 0.05 to 10 weight percent of the layer, the activator in an amount of about 20 to 50 weight percent of the layer, and the color former in an amount of about 3 to 50 weight percent of the layer.