Transparent thermal recording medium

Details Transparent thermal recording medium Transparent thermal recording medium

1995-06-07

1998-04-21

Hess, Bruce H.

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Identified color-former

427152, 503216, 503217, 503226, B41M 530, B41M 540

Patent

active

057417520

ABSTRACT:
This invention provides a transparent thermal recording medium, in which the transparent thermal recording medium comprises: a thermal recording layer, which is provided on a transparent layer, consisting essentially of an electron-donating chromophoric compound, an electron-accepting compound and binder resin; and a further-provided protective layer having an approximately equal refractive index to the refractive index of the thermal recording layer, wherein the binder resin is a compound having a group selected from a hydroxyl group and a carboxyl group. The transparent thermal recording medium can be effectively used for a block copy film, on which an image is formed, for plate-making, particularly, in photogravure, offset printing and screen process printing, because the transparent thermal recording medium has a contrast of light transmission factors between a color-imaging portion and a non-imaging portion, in which the contrast is not less than 50% at a wavelength ranging from 370 nm to 450 nm.

REFERENCES:
patent: 5380693 (1995-01-01), Goto
patent: 5403810 (1995-04-01), Sawamura et al.
Patent Abstracts of Japan, vol. 13, No. 311 (M-851) (3659), Jul. 17, 1989, JP-1-99873, Apr. 18, 1989.
Patent Abstracts of Japan, vol. 18, No. 206 (M-1591) (6546), Apr. 12, 1994, JP-6-8626, Jan. 18, 1994.

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