PROCEDE DE FORMATION D'IMAGES POLYCHROMES ET MATIERES DE FORMATION D'IMAGES POLYCHROMES POUR SA MISE EN OEUVRE

L'INVENTION SE RAPPORTE A UN PROCEDE DE FORMATION D'IMAGES POLYCHROMES UTILISANT UNE MATIERE PHOTOSENSIBLE POUR TRANSFERT A CHAUD CONSTITUEE D'UN SUBSTRAT TRANSPARENT, D'UNE COUCHE COLOREE SOLUBLE DANS L'EAU MAIS INSOLUBILISABLE PAR LA LUMIERE, ET D'UNE COUCHE INTERMEDIAIRE THERMO-FUSIBLE ET A POUVOIR LIANT INTERCALEE ENTRE ELLES.LEDIT PROCEDE COMPORTE 1 L'EXPOSITION A TRAVERS UN NEGATIF ET LE DEVELOPPEMENT DE LA COUCHE COLOREE; 2 LE TRANSFERT A CHAUD DE LA SURFACE D'IMAGE AINSI OBTENUE ET DE LA COUCHE INTERMEDIAIRE SUR UNE MATIERE RECEPTRICE A SURFACE THERMO-FUSIBLE ET APTE A LA LIAISON; ET 3 LA REITERATION POUR LES COULEURS SUBSEQUENTES OBTENUES CONFORMEMENT A L'ETAPE 1 DU TRANSFERT DE L'ETAPE 2 EN UTILISANT A CHAQUE FOIS LA MATIERE RECEPTRICE POURVUE DES IMAGES PRECEDEMMENT TRANSFEREES.APPLICATION A L'OBTENTION D'EPREUVES PRELIMINAIRES EN COULEURS DANS LA SIMILIGRAVURE. Multicolor image products useful for prepress color proofing. The products are laminates of a transfer support sheet; an adhesive layer of a heat-fusible and bondable material on a surface of said transfer support sheet; an image layer of a first color provided on the adhesive layer and having image areas of a water-insoluble resin component and non-image areas, the image areas being bonded to the surface of the adhesive layer; and one, two or three additional image layers each of a different color other than that of the first image layer. Each image layer is separated from another image layer by an intermediate layer of a material which is harmless to hue and transparency and has opposed first and second surfaces, the second surface being adhered to the image areas of the image layer closer to the transfer support sheet and to the adhesive layer or other intermediate layer at the non-image areas and being non-sticky at room temperature, heat-fusible and directly transferable to another heat-fusible surface at a temperature which prevents dimensional change and deformation of the surfaces so as to provide exact registration of the image layers and water-insoluble. The first surface of each intermediate layer is adhered to the image areas of the image layer farther from the transfer support sheet and to any additional intermediate layer and has the characteristics of the second surface except that the first surface is not required to be water-insoluble. An intermediate layer is also provided as the outermost layer of the laminate.