Method for thermal dye transfer printing, dye transfer sheets an

Details Method for thermal dye transfer printing, dye transfer sheets an Method for thermal dye transfer printing, dye transfer sheets an

1992-06-29

1994-08-02

Hess, B. Hamilton

Record receiver having plural interactive leaves or a colorless

Having plural interactive leaves

156234, 156235, 428195, 428913, 428914, B41M 5035, B41M 538

Patent

active

053345746

ABSTRACT:
Thermal dye transfer printing systems which are adapted For multiple-use printing modes wherein one dye transfer sheet is repeatedly used and which comprise a dye transfer sheet having, on a substrate, a dye transfer layer containing a sublimable dye and a binder resin and a dye receiving sheet having a dye receiving layer which has a diffusion rate of the dye smaller than the dye transfer layer. This is effective in suppressing a lowering of printing density owing to the increase in number of printing cycles using one dye transfer sheet. Alternatively, the dye transfer sheet is constituted such that the dye transfer layer is made of a plurality of sub-layers in which the concentration of the dye decreases from the sub-layer formed directly on the substrate toward the surface side of the dye transfer layer. The dye is invariably supplied from the higher concentration sub-layers to ensure full color printing with a remarkably increasing number of multiple-use printing cycles.

REFERENCES:
patent: 4623580 (1986-11-01), Koshizuka et al.
patent: 4724288 (1988-02-01), Hann
patent: 4880768 (1989-11-01), Mochizuki et al.
patent: 4902669 (1990-02-01), Matsuda et al.
H. Matsuda et al, "Partially Reusable Printing Characteristics of Dye Transfer Type Thermal Printing Sheets" in Collected Papers of Proceedings of 2nd Non-impact Printing Technologies Symposium, pp. 101-104 (1985).
T. Shimizu et al, "Multi-Usable Sublimation Dye Sheets" National Convention Record of the Institute of Image Electronics Engineers (Jun. 1986) pp. 1-4.
H. Matsuda et al, "Multi-Usable Dye Transfer Sheets", Advanced Printing of Paper Summaries of the 30th Anniversary Conference of the Society of Electrophotography of Japan, pp. 266-269.

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