| abstract |
A method of forming an image is disclosed in which chemically active toner particles are used to trigger image amplification chemistry after their attraction to an electrostatic charge pattern. The method of forming an image comprises applying electrographic toner particles to a charge pattern on a support followed by a chemical amplification processing step comprising heating the toner image in the presence of an image-receiving element comprising: (a) a cobalt(III) complex capable of releasing an amine on processing, and (b) an amplifier which, on reaction with an amine: (i) forms a dye or dye precursor, or (ii) reduces the cobalt(III) complex, resulting in the release of additional amine, said toner comprising an activator which, under the conditions of processing releases an amine either directly or indirectly. |