Patent ID: 8765855

Claim:
A laser marking composition comprising (I) a marking component comprising (a) a combination of vanadium pentoxide, cobalt oxide and tungsten oxide and (b) zinc phosphate; and (II) a binder comprising i) a resin selected from the group consisting of acrylics, acrylates, alkyds, cellulose, cellulose derivatives, polysaccharides, polysaccharide derivatives, rubber resins, ketones, maleics, formaldehydes, phenolics, epoxides, fumarics, hydrocarbons, isocyanate free polyurethanes, polyvinyl butyral, polyamides, shellac, polyvinyl alcohol and any combination thereof; and ii) a solvent selected from the group consisting of methylated spirits, alkyl acetate, propanol, isopropanol, n-propyl acetate, toluene, xylene, cyclohexanone, alkoxyethanol, butoxyethanol, aromatic distillates having a boiling point of from about 200° C. to 310° C., water, and any combination thereof, wherein upon irradiation in a wavelength range of between about 700 nm and 14000 nm the laser marking composition bonds to a substrate to which it is contacted.