Agfa Gevaert Nv

Agfa-gevaert Ag

Agfa-gevaert

Agfa-gavaert N.v.

Wilhelmus Janssens

Luc J Vanmaele

Daniel A Claeys

Geert H Defieuw

Christian C Van De Sande

Raymond Gerard Lemahieu

Jean-Marie O Dewanckele

Hans Vetter

Herman J Uytterhoeven

Armand M Van Den Bergh

Jozef Aime Dierckx

Daniel M Timmerman

Albert Lucien Poot

Jan A Van Den Bogaert

Raymond A Roosen

Frans Clement Heugebaert

Johannes Josephus Vanheertum

Joan T Vermeersch

Marcel J Monbaliu

Heinrich Odenwalder

Jean-Pierre D Tahon

Leon L Vermeulen

Robert J Pollet

Emiel A Verdonck

Hendrik E Kokelenberg

Eric Kiekens

Ernst Meier

Jozef Frans Willems

Wolfgang Lassig

Jan J Priem

Andre Verhecken

Bart Horsten

Christiaan G Thiers

Hendrik Hubert Sneyers

Jan Jaeken

Marcellus H De Meyer

Jan A Van Der Bogaert

Robert Joseph Pollett

Julius L Vuyts

Albert A Reyniers

Danie A Claeys

Frans Carael

Modest Vereycken

Alphonse Somers

Daniel, M Timmerman

Wilfried F Liekens

Antoine August De Jaeger

Receiving element for use according to transfer printing, comprising on a support a receiving layer comprising a silver source, capable of being reduced by means of heat in the presence of a reducing agent, a binder and a stabilizer selected from the group of benzotriazoles, heterocyclic mercaptanes, sulphinic acids, 1,3,4-triazo-indolizines, 1,3-dinitroaryl compounds, 1,2,3-triazoles, phthalic acids and phthalic acid derivatives. The receiving element provides images with higher stability at elevated temperatures and upon exposure to light.

Receiving element for use in thermal transfer printing

The present invention provides a security document comprising (1) a laminate comprising two laminating elements serving as support and covering element and (2) an information carrier laminated between the laminating elements, at least one laminating element comprising two transparent or translucent plastic sheets serving as outer resin layer and inner resin layer characterized in that in the said at least one laminating element comprising an outer resin layer and an inner resin layer a fluorescent dye is comprised between said outer resin layer and said inner resin layer, said fluorescent dye giving light piping in said laminating element containing said fluorescent dye when irradiated with light having a wavelength between 200 and 1000 nm.

Laminated security document containing fluorescent dye giving light

Dye-donor element for thermal dye transfer comprising at least one magenta dye having extremely low side absorption in the blue and red regions of the spectrum, said dye corresponding to the general formula (I) : ##STR1## wherein R.sup.1 is H, (cyclo)alkyl, or aryl; X represents the atoms completing a heterocycle; Z is an electron-withdrawing group; Y is an electron-withdrawing group or --N(R.sup.2)R.sup.3 ; R.sup.2 and R.sup.3 together represent the atoms completing a heterocycle; or R.sup.2 and R.sup.3 together represent .dbd.C(R.sup.4)R.sup.5, or each of R.sup.2 and R.sup.3 represents (same or different) (cyclo) alkyl, aryl, or an electron-withdrawing group; each of R.sup.4 and R.sup.5 (same or different) represents H, (cyclo)alkyl, aryl, a heterocycle, SO.sub.2 R.sup.6, COR.sup.6, CSR.sup.6, POR.sup.6 R.sup.7, OR.sup.8, NR.sup.8 R.sup.9, SR.sup.8, or R.sup.4 and R.sup.5 together represent the atoms completing an aliphatic ring or a heterocycle, each of R.sup.6 and R.sup.7 (same or different) represents (cyclo) alkyl, alkenyl, aryl group, alkyloxy, aryloxy, alkylthio, arylthio, amino, a heterocycle, or R.sup.6 and R.sup.7 together represent the atoms completing a 5- or 6-membered nucleus, and each of R.sup.8 and R.sup.9 (same or different) represents (cyclo) alkyl, alkenyl, aralkyl, aryl, a heterocycle, or R.sup.8 and R.sup.9 together represent the atoms completing a 5- or 6-membered nucleus.

Dyes and dye receiver elements for thermal dye transfer recording

The present invention provides a dye donor element for use according to thermal dye transfer methods comprising a support having thereon a dye layer comprising a binder and a yellow dye of the class of N-alkyl-N-para-aminoaryl-substituted dicyanovinylaniline dyes. Images obtained with such a donor element in a thermal dye diffusion transfer process are less susceptible to catalytic fading and have thus an improved light fastness.

N-alkyl-N-para-aminoaryl substituted dicyanovinyl aniline dyes for use

The present invention provides a donor for use in thermal transfer printing. The donor element comprises on a support a donor layer comprising a binder and a mixture of at least two thermotransferable reducing agents capable of reducing a silver source to metallic silver upon heating. The donor element is image-wise heated while being in contact with an image receiving material comprising a thermoreducible silver source. By using a mixture of reducing agents crystallization is reduced and the obtained images exhibit an increased density and a more neutral grey hue.

Thermal transfer printing process using a mixture of reducing agents for

Dye-donor element for use according to thermal dye transfer methods, said element comprising a dye layer comprising at least one tricyanovinylaniline dye, wherein the amino group of the aniline function of said dye carries an aryl group and a hydrocarbon or substituted hydrocarbon group linked by a secondary carbon atom to said amino group. The dyes have very good light-fastness and good spectral absorption characteristics.

Dye-donor element comprising tricyanovinylaniline dyes

A thermal imaging process is provided using (i) a donor element comprising on a support a donor layer comprising a binder, a thermotransferable reducing agent capable of reducing a silver source to metallic silver upon heating and a thermotransferable toning agent and (ii) a receiving element comprising on a support a receiving layer comprising a silver source capable of being reduced to metallic silver by means of heat in the presence of a reducing agent, said thermal imaging process comprising the steps of bringing said donor layer of said donor element into face to face relationship with said receiving layer of said receiving element, image-wise heating a thus obtained assemblage preferably by means of a thermal head, thereby causing image-wise transfer of an amount of said thermotransferable reducing agent to said receiving element in accordance with the amount of heat supplied and separating said donor element from said receiving element. Images having a neutral grey tone can be obtained according to this method. The present invention further provides a donor element for use in the above method.

Thermal transfer process wherein a reducing agent and toning agent are

Dye donor element for use according to thermal dye sublimation transfer comprising a support having thereon a dye layer comprising at least one heterocyclic hydrazono dye, wherein said dye corresponds to the general formula:

Dyes and dye-donor elements for use in thermal dye transfer

The present invention provides a method for reproducing continuous tone images by means of a thermal head. The method involves the image-wise heat transfer of a reducing agent from a donor element to a receiving layer of a receiving element. The receiving element contains a thermoreducible silver source such as e.g. silver behenate. The process of the present invention provides high density images with multiple intermediate density levels.

Thermal transfer imaging process

The present invention concerns a thermal imaging process using (i) a donor element comprising on a support a donor layer comprising a binder and a thermally transferable reducing agent capable of reducing a silver source to metallic silver upon heating and an oxidised form of the reducing agent being colored or being capable of forming a color and (ii) a receiving element comprising on a support a receiving layer comprising a silver source capable of being reduced by means of heat in the presence of a reducing agent and comprising the steps of: bringing said donor layer of the donor element in face-to-face relationship with the receiving layer of the receiving element, image-wise heating a thus obtained assemblage to cause image-wise transfer of the thermally transferable reducing agent from the donor layer to the receiving layer in accordance with the amount of heat applied and separating the donor element from the receiving element.

Thermal imaging process and an assemblage of a donor and receiving

The present invention provides a donor element comprising on a support a donor layer comprising a binder, a thermotransferable reducing agent capable of reducing a silver source to metallic silver upon heating and a thermotransferable dye. When such a donor element is used in a thermal transfer printing process in conjunction with a receiving element having a receiving layer that contains a thermoreducible silver source, an image of a neutral black tone and having a high optical density is obtained.

Dyed receiving elements which comprise a heterocyclic hydrazono dye

The present invention provides a dye donor element comprising on a support a dye layer containing a dye dispersed or dissolved in a binder and a thermotransferable infrared absorbing azo dye having an absorption maximum above 700 nm as a stabilizer, said thermotransferable infrared absorbing azo dye being comprised in said dye layer and/or in a layer adjacent thereto. There is further provided an image receiving element comprising an infrared absorbing azo dye as a stabilizer.

Thermal dye transfer image with improved light-fastness

The present invention provides a printing process using a donor element and a receiving element. The donor element comprises on a support a donor layer comprising a binder and a thermotransferable strong reducing agent capable of reducing a silver source to metallic silver upon heating. The donor element is image-wise heated while being in contact with an image receiving material comprising a thermoreducible silver source and a weak reducing agent, only being capable of reducing a silver source to metallic silver in the presence of metallic silver formed by said strong reducing agent. Image density is increased and stability of the reductor donor element can be improved.

Thermal transfer imaging system based on the heat transfer of a reducing

An assemblage for use according to thermal dye transfer methods, consisting of (i) a dye-donor element and (ii) a receiving element containing on a support a dye receiving layer comprising a homo- or copolymer of vinylchloride, said dye donor element comprising a support having thereon a dye layer comprising a binder and at least one yellow N-aryl-N-alkyl-substituted dicyanovinylaniline dye, wherein the N-aryl group either carries an electron-donative group having a negative Hammett sigma para value, or carries 2 to 5 substituents, which may be same or different and have Hammett sigma para values, the sum of which is negative.

Dye-donor element comprising yellow dicyanovinylaniline dyes

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Aarschot, Belgium

Wilhelmus Janssens