Imaging medium with reduced dye diffusion

Details Imaging medium with reduced dye diffusion Imaging medium with reduced dye diffusion

B - Operations, Transporting

41

M

B41M 5/28 (2006.01) B41M 5/30 (2006.01) B41M 5/44 (2006.01)

Patent

CA 2068024

C-7682 IMAGING MEDIUM WITH REDUCED DYE DIFFUSION Abstract An imaging medium comprises a color-forming layer comprising a color-forming composition adapted to undergo a change of color upon exposure to actinic radiation, the color-forming composition being dispersed in a first polymer having a glass transition temperature of at least about 50°C; and at least one diffusion-reducing layer in contact with one face of the color-forming layer, the or each diffusion-reducing layer comprising a second polymer, having a glass transition temperature of at least about 50°C, and being essentially free from the color-forming composition. Post-imaging diffusion of the colored materials formed during imaging is reduced by the use of the high glass transition temperature polymer in the color-forming layer and the provision of the diffusion-reducing layer(s), so that the images formed are stable upon storage.

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