| abstract |
A method for recording information in a luminescent composition, comprising: a) providing a luminescent composition comprising, in a suitable vehicle or diluent, at least one first and second luminescent compound, wherein the first luminescent compound is a luminescent donor compound having a maximum luminescent emission spectrum in a given wavelength, in which the second luminescent compound is a luminescent compound acceptor that has a maximum absorption spectrum in a wavelength longer than the given wavelength, and in that the emission spectrum of the luminescent donor compound at least partially overlaps the absorption spectrum of the luminescent acceptor compound; b) combining said composition with a substrate, so that at least a part of the composition is available for exposure to a photon source, and; c) fixing the information at predetermined sites in said composition combined by localized exposure to a photon source, said fixation causing an information pattern when exposed to a luminescence deciphering device. |