METHOD FOR MANUFACTURING PAPER WITH MULTITONE WATERMARK, PAPER WITH MULTITONE WATERMARK, PRINTED PRODUCT WITH MULTITONE WATERMARK
The group of inventions relates to paper technology. The technical result of the present invention is that of widening the scope of the technological capabilities of the process for producing a watermark in paper while enhancing the potential of the watermark as a protective anti-counterfeiting elem...
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Zusammenfassung: | The group of inventions relates to paper technology. The technical result of the present invention is that of widening the scope of the technological capabilities of the process for producing a watermark in paper while enhancing the potential of the watermark as a protective anti-counterfeiting element. This result is achieved in that the method for manufacturing paper with a multitone watermark consists of using a relief mask for forming a paper web on a paper machine, said relief mask being a partially permeable forming element. This element is formed on the surface of a forming mesh cylinder, or on a dandy roll of a Fourdrinier machine. The mask has a variable height across the area of the watermark image, produced by the relief stamping of the mesh, of electrotypes and/or the combined stamping of the mesh and the electrotypes, and/or by the use of a multiplicity of electrotype layers; furthermore, the individual successive electrotype layers in the mask can have apertures varying in diameter and in density. The mask is assembled from a plurality of layers of perforated metal plates or the mask is assembled from a plurality of layers of polymer plates or composite materials, resin (adhesives) filling is used in the formation of the mask, the mask is combined of a plurality of layers of perforated plates of metal, polymers, and composite materials. A paper and a printed product which are protected against counterfeiting and manufactured according to the above-mentioned method are claimed.
Le groupe d'inventions se rapporte aux technologies du papier. Le résultat technique de la présente invention est davantage de possibilités techniques du processus de fabrication de filigrane dans du papier et un plus haut potentiel de protection du filigrane en tant qu'élément contre la contrefaçon. Le résultat est obtenu en ce que la procédé de fabrication de papier à filigrane à teintes multiples est utilisé dans le procédé pour couler et fabriquer un tissu de papier sur une machine à papier d'un masque en relief se présentant comme un élément de formage partiellement perméable à l'eau. L'élément est formé à la surface d'une grille de formation de cylindre ou sur l'égouttoir de la machine à papier à grille plane. Le masque a une hauteur variable en termes de surface du filigrane créé par l'emboutissage en relief de la grille, des filigranes et/ou par un emboutissage combiné de la grille et des filigranes et/ou par l'utilisation de plusieurs couches de filigrane, les |
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