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US 5,395,729 AGranted
Laser-induced thermal transfer process
AssigneeE. I. Du Pont de Nemours and Company
InventorsJoseph E. Reardon, Anthony J. Serino
Life of this patent
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Abstract
A laser-induced melt transfer process is described which utilizes a melt viscosity modifier and in which a post-transfer treatment is used to substantially eliminate back-transfer.
Claims4
A laser-induced melt transfer method for making a color image which comprises:
- a) imagewise exposing to laser radiation a laserable assemblage consisting essentially of:
- 1) a donor element consisting essentially of a support bearing on a first surface thereof a composition selected from the group consisting of:
- (A) (i) at least one colorant, (ii) at least one resin which is capable of undergoing a curing reaction, and (iii) at least one melt viscosity modifier to lower melt viscosity,
- (B) (i) at least one imageable component, (ii) at least one resin which is capable of undergoing a curing reaction, (iii) at least one melt viscosity modifier to lower melt viscosity, and (iv) a binder,
- (C) (i) at least one imageable component, (ii) at least one resin which is capable of undergoing a curing reaction, (iii) at least one melt viscosity modifier to lower melt viscosity, and (iv) a laser radiation absorbing component, and
- (D) (i) at least one imageable component, (ii) at least one resin which is capable of undergoing a curing reaction, (iii) at least one melt viscosity modifier to lower melt viscosity, (iv) a binder, and (v) a laser radiation absorbing component,
- wherein (ii) and (iii) can be the same or different, and
- wherein (i), (ii) and (iii) can be in the same or different layers, and
- 2) a receiver element situated proximally to the first surface of the donor element, wherein a substantial portion of (i), (ii) and (iii) is transferred to the receiver element;
- b) separating the donor element from the receiver element;
- and
- c) exposing the receiver element of step (b) to a post-transfer curing treatment,
- steps (a)-(c) being repeated at least once using the same receptor and a different donor element having a colorant the same as or different from the first colorant.
10 more elements
Dependencies are inferred from the claim text.