Patent ID: 7727418

Claim:
A thermoplastic composition comprising: a thermoplastic polymer, and a dye combination comprising a black dye, and a fluorescent dye which fluoresces in the visible region of the spectrum, wherein the black dye is non-fluorescent, and wherein a molded article having a thickness of 2.0 millimeters and consisting of the thermoplastic polymer, the black dye, and the fluorescent dye, has a percent transmission of infrared light according to ASTM D1003-00 of greater than or equal to 50%, when measured at a wavelength of 800 to 1,100 nm, and a percent transmission of visible light, according to ASTM D1003-00 of less than or equal to 15%, when measured at a wavelength of 400 to 650 nm; and wherein a molded article consisting of the thermoplastic polymer, black dye, and fluorescent dye has, when measured according to ASTM E1331-04, a percent reflectance (% R) of greater than 7% at a wavelength of 400 to 650 nm.