Diffusion or sublimation transfer imaging system
AssigneeMinnesota Mining and Manufacturing Company
InventorsRanjana C. Patel, John H. A. Stibbard, Michael G. Fisher, Terence W. Baldock
Life of this patent
Estimating the term…
Abstract
Images can be formed on a receptor sheet by transfer of a dye image. The positive dye image is formed by bleaching of dye with an iodonium ion. The positive dye image is then transferred by sublimation or diffusion onto a receptor sheet.
Claims15
A process for forming an image which comprises image-wise exposing to radiation of selected wavelength a carrier element comprising, as image forming components, in one or more imaging layers coated on a support a bleachable dye in reactive association with iodonium ion thereby bleaching the dye in exposed areas to form a positive image, and thereafter transferring the positive dye image to a receptor which is either a receptor layer present on the carrier or a separate receptor element by
- (i) heating the carrier element to a sufficient temperature to allow the dye image to sublime to the receptor thereby forming an image on the receptor, or
- (ii) providing a liquid medium between the positive dye image and receptor for a sufficient time to allow transfer of the dye image to the receptor.
The combination of a radiation-sensitive carrier element comprising, as image-forming components, one or more imaging layers coated on a support, a bleachable dye in reactive association with iodonium ion and a separate receptor element comprising a substrate having coated thereon a receptor layer comprising a polymeric binder and optionally a mordant.
A radiation-sensitive element comprising, as image-forming components, one or more imaging layers coated on a support, a bleachable dye in reactive association with iodonium ion and a receptor layer comprising a polymeric binder and optionally a mordant.
Dependencies are inferred from the claim text.