Stable emissive toner composition system and method

G - Physics – 03 – G

Patent

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G03G 9/08 (2006.01)

Patent

CA 2697072

An emissive toner composition for producing an emissive image component of an image indicia on a substrate. The emissive toner composition includes a photoluminescent agent, a charge control agent, and one or more additives, each selected and present in an amount such that when the toner composition is printed to produce an image component on a substrate, the toner composition has stable spectral characteristics. In one embodiment, the emission spectra of the image component printed on the substrate, for irradiation with an excitation energy includes only dominant emission peaks corresponding to one or more emission peaks of the photoluminescent agent. In another embodiment, the image component has a photoluminescent toner stability factor of about greater than or equal to 25.

Cette invention se rapporte à une composition émissive pour toner permettant de produire un composant d'image émissif d'indice d'image sur un substrat. La composition émissive pour toner comprend un agent photoluminescent, un agent à charge contrôlée, et un ou plusieurs additifs, chacun étant choisi et présent en une quantité telle que lorsque la composition pour toner est imprimée pour produire un composant d'image sur un substrat, la composition pour toner présente des caractéristiques spectrales stables. Dans un mode de réalisation, les spectres d'émission du composant d'image imprimé sur le substrat, pour une irradiation avec une énergie d'excitation ne comprennent que des pics d'émission dominants correspondant à un ou à plusieurs pics d'émission de l'agent photoluminescent. Dans un autre mode de réalisation, le composant d'image présente un facteur de stabilité du toner photoluminescent d'environ au moins 25.

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