Patent ID: 8257897

Claim:
A method of forming an image, comprising: with a toner set comprised of a plurality of toners, at least one toner but less than all toners of the toner set comprising binder, colorant and fluorescence agent and remaining additional toners comprised of binder, colorant and free of fluorescence agent, wherein at least a first toner grouping and a second toner grouping of the toner set form a combination, the first and second groupings of the combination exhibiting a substantially same color and a substantially same gloss under ambient light conditions upon image formation, the first toner grouping and the second toner grouping of the combination containing a different amount of the fluorescence agent, wherein upon exposure to activating energy, the fluorescence agent fluoresces to cause a visible change in the color of a pattern formed in an image by the first toner grouping as compared to the second toner grouping, forming a latent image of a first pattern on a photoreceptor, developing the first pattern with the first toner grouping, and subsequently transferring the developed first pattern to a recording medium, and forming a latent image of a second pattern on a photoreceptor, developing the second pattern with the second toner grouping, and subsequently transferring the developed second pattern to the recording medium.