SI25242A - Optical protection of paper and printed matter using NIR fluorescent dyes and/or pigments and the procedure for its implementation - Google Patents

Abstract

Subject of the invention is the optical protection of paper and printed matter by using "near infra red" fluorescence dyes and / or pigments in the production of paper with protectors and in the printing of printed matter where NIR fluorescent dyes and / or pigments are used as optical protectors in paper and printed matter, including for the production of papers, banknotes, passes and similar against forgery and / or forgery of as much as well-protected documents. NIR fluorescent dyes and / or pigments are used for the dyeing of protective fibers, paper masses, in the manufacture of a protective thread, "blanchette" and other additives that can be added to paper or optically protected products and in the finished product represent effective paper protection. The invention also relates to the use of NIR fluorescent pigments and / or colorants in the press. According to the invention, the manufacturing of the described optical protectors in the production of paper and printed matter is also envisaged using NIR (near infrared) fluorescent dyes and / or pigments.

Description

OPTICAL PROTECTION OF PAPERS AND PRINTINGS BY APPLICATION OF NOR FLUORESCENT COLORS AND / OR PIGMENTS AND PROCEDURE FOR

HIS OUTDOOR

Subject of the invention is the optical protection of paper and printed matter using "near infra red" fluorescence dyes and / or pigments in the production of paper with shields and in printing printed matter with shields and a process for its execution. The paper and printed matter of the present invention are used primarily for the production of papers, banknotes, cards and the like against forgery and / or forgery of as much as possible the best protected documents.

The present invention belongs to the field of the paper and printing industry, namely the production of paper and printing, and in particular refers to the production of papers, banknotes and the like against counterfeiting and / or falsification of as much as possible the best protected documents.

The technical problem successfully solved by the present invention is the new possibility of optical protection of paper and printed matter using NIR fluorescent dyes and / or pigments in paper and printed matter. Paper and printed matter with shields require continuous improvement in the area of adding and / or changing protective elements, as counterfeiters are increasingly equipped with materials and materials with which they can make counterfeits, and are therefore increasingly successful. Many optical security features are already known today in the world. They contain watermarks in paper, fibers that fluorescise when exposed to UV light, UV fluorescent blans, UV fluorescent filaments, use of optical variabars, etc.

As protective coatings, visible and / or invisible colors used in paper protection are used to fluoresce in the visible part of the spectrum if they are illuminated by UV light and thus become visible.

There are known embodiments of optical paper protection, such as, for example, in the patent document ES2432189, wherein the protective fibers are printed from a plurality of different colors which can be illuminated by UV illumination. The fibers are added to the paper mass. Patent document VV02007 / 144657 describes fluorescent "blanks" for integration into paper. "Blanches" have a complex shape, the color is visible only by UV light.

The security thread embedded in the paper in the paper production phase can provide various optical protections, as described in US Patent Publication Nos. 0,964,014; US 4,652,015; US 5,068,008; US 5,324,079; WO 90/08367; WO 92/11142; WO 96/04143; WO 96/39685; WO 98/19866; EP 0 021 350; EP 0 185 396; EP 0 303 725; EP 0 319 157 EP 0 518 740; EP 0 608 078; and EP 1 498 545. The strand can be metallized, contains a hologram, can be printed with UV fluorescent or optically variable colors.

For all the above patent documents, the use of various optical protectors in paper or in the press is described, and the use of NIR fluorescent dyes and / or pigments in the production of paper and printed matter with protections is not foreseen. NIR fluorescent dyes are so far unknown in the world of paper and printed matter. Dyes and pigments are not yet ready for coloring paper, protective fibers and for printing a protective thread and a "blanket". Because of the described invention, the problem of counterfeiting is also solved, which, thanks to the availability of colors and materials, has become easier for counterfeiters in recent years.

In the present solutions, UV fluorescent colors must be illuminated by UV light, fluorescing them in the visible part of the spectrum. NIR fluorescent colors can be illuminated by visible light or by UV light, and the fluorescent response is obtained in the NIR part of the spectrum. Most fluorescent materials absorb energy at higher energy (lower wavelengths in the spectrum) and transmit lower energy (at higher wavelengths) - this phenomenon is called "dovvn-conversion." Such printing inks are typically made on the basis of UV fluorescent materials that illuminate in the visible range if they are illuminated by UV light. NIR fluorescent materials convert visible light into NIR light, which means that fluorescence is obtained in the NIR light range.

The invention relates to the optical protection of paper and printed matter by using NIR fluorescent dyes and / or pigments in the printing of printed matter with shields, the use of NIR dyes and / or pigments in the dyeing of protective viscous, cotton or synthetic, polymeric fibers, paper pulp and printing a protective thread, "blanchette" and other additives that can be added to the paper and in the finished product represent effective paper protection. The invention also relates to the use of NIR dyes in printing.

In the following, the invention will be explained in more detail on the basis of the submitted images and the described use cases and / embodiments of optical protectors with NIR fluorescent dyes and / or pigments in the production of paper and printed matter according to the invention, which show: FIG. 1A NIR fluorescent pigments added to the entire paper mass (left) and NIR fluorescent pigments added to the water-based printing coating (right). The images are recorded in a visible light spectrum; Figure 1B paper (left in the picture) and printing coating with NIR fluorescent pigments in the NIR area; Figure 2 protective fibers colored with NIR pigments in the visible area (left) and NIR area (right), Figure 3 invisible protective fibers colored with NIR pigments in the visible area (left) and the same fibers visible in the NIR area (right). Figure 4 is an invisible protective blanch in paper in the visible area (left) and the same visible protective blanks in the NIR area (right). Figure 5 Integrated protective thread with NIR pigment coating in paper in the visible area (left) and NIR area (right).

As illustrated in FIG. 1A and FIG. 1B, NIR fluorescent pigments are added to the entire paper pulp process and the printing coating. NIR fluorescent pigments are visible only in the NIR range. Paper with added NIR fluorescent pigments is made according to the known process, and the printing coating has been mixed homogenously, since the coating in the NIR area is evenly visible.

In Figure 2 and Figure 3, protective fibers with NIR fluorescent pigments with a fixing agent are colored, where they are added in a certain proportion of the paper mass in the production of paper or paper. printed matter with optical protection.

The production and operation of invisible protective "blanchtes", where certain paper is printed with a coating containing NIR fluorescent pigment, is illustrated in Figure 4. Colored "blanches" with NIR fluorescent pigment and / or dye are added in a certain proportion to the entire paper mass in the process paper production printed matter with optical protection.

In the optical protection of paper and printed matter using NIR fluorescent dyes and / or pigments for painting paper, the pigments and / or dyes are added to the paper mass during the paper making process. Dyes and / or pigments may be visible, which means that the paper is colored or invisible, which means it does not affect the color of the paper.

NIR fluorescent dyes and / or pigments can also be used to dye protective fibers. Protective fibers are viscous, polymeric or synthetic or cellulose fibers. The fibers are stained using NIR fluorescent dyes and / or pigments added to the paper mass. The paper is made of paper pulp containing cellulose fibers and / or, inter alia, added polymeric fibers to improve certain physical and chemical properties of the paper. In addition, colored protective fibers are added to this mass. Dyes and / or pigments may be visible, which means that the fibers are colored or invisible in the area of the visible part of the spectrum. NIR fluorescent dyes and / or pigments can be printed on foils (polyester, polypropylene or other types of foil) from which a protective thread which is installed in the paper is made by the known cutting procedure, usually at a width of 0.8 to 6 mm. The protective thread is a thermoplastic polymer material, metallised or made from a different kind of material embedded in paper during the manufacturing process as an additional security element. There are several types of different protective threads, from polymeric to metal-coated, from colored threads and filaments with micro-text in protective film to high-tech threads, which are machine readable, e.g. magnetic or holographic personalized protective threads. The protective thread can be completely embedded in the substrate or it is visible on the surface at intervals.

The invention furthermore provides for the method of implementing the previously described optical protectors, in the production of paper and printed matter using NIR fluorescent dyes and / or pigments, where: - in the case of coloring the entire paper mass with NIR fluorescent pigments and / or dyes, they are added to - in the case of the manufacture of paper with an optical protective only with a coating process containing NIR fluorescent pigments and / or colorants, NIR fluorescent pigments and / or NIR are added to the color or non-colored coating, or coloring matter, and the paper can thus be pushed through existing printing techniques. The coating can be on a water based, solvent-based or UV-dried coating. - in the case of coloring of protective fibers with NIR fluorescent pigments added to the paper with optical protections, they can be dyed by the addition of a fixing agent. If the fibers are dyed with NIR fluorescent dyes, the already known process of coloring fibers should be used. - in the case of coloring of the protective thread to be embedded in the paper, the protective thread is pushed with a color or non-colored coating (with varnish or paint) to which NIR fluorescent pigments or NIR are added. coloring. The thread is then cut and embedded into the paper according to the known process. Coating containing NIR fluorescent pigments and / or dyes can be printed with existing printing techniques. The coating can be on a water based, solvent-based or UV-dried coating. - in the case of coloring "blanchtes", the paper is suitable for the production of "coatings" with coating (with varnish or paint) to which NIR fluorescent pigments and / or dyes are added. The "Blanches" are then cut out and installed in paper according to the known process. Coating containing NIR pigments and / or dyes can be printed with existing printing techniques. The coating can be on a water based, solvent-based or UV-dried coating.

Protective thread, visible at intervals in paper or The printed matter with optical protection printed with a coating containing NIR fluorescent pigments is shown in Figure 5.

Claims (14)

PATENT CLAIMS 1. Optical protection of paper and printed matter using NIR fluorescent dyes and / or pigments, characterized in that the NIR fluorescent dyes and / or pigments are used for the dyeing of protective fibers, paper mass and in the manufacture of a protective thread, blanchette and other additives , which can be added to paper or optocouplers for the production of papers, banknotes, cards and the like against counterfeiting and / or falsification of as much as well-protected documents. Optical paper and printed matter protection according to claim 1, characterized in that the NIR fluorescent dyes and / or pigments are used to dye paper, wherein the pigments and / or dyes are added to the paper mass in the process of manufacturing paper when the dyes are and / or pigments may be visible, which means that the paper is colored or invisible, which means it does not affect the color of the paper. 3. Optical paper and printed matter protection according to claim 1, characterized in that the protective viscous, cotton or synthetic or crystalline tinted ink is dyed with NIR fluorescent dyes and / or pigments. polymeric fibers are added to the paper mass in the manufacture of paper, wherein the paper is made of a paper pulp comprising cellulosic and / or, inter alia, added polymeric fibers to improve certain physical and chemical properties of the paper. 4. Optical paper and printed matter protection according to claim 1, characterized in that the paper is suitable for the manufacture of coating impregnating "blankets" containing a NIR fluorescent dye and / or pigment, then "bleaching" the cutout and incorporating it into paper according to known procedure. Optical paper and printed matter protection according to claim 1, characterized in that the coating containing the NIR fluorescent dye and / or pigment is pushed by the thermoplastic polymer film from which a protective thread is installed that is incorporated into the paper. Optical paper and printed matter security according to claim 1, characterized in that an existing printing technique is used for the optical protection of paper and printed matter with NIR fluorescent dyes and / or pigments. 7. Optical paper and printed matter protection according to claim 1, characterized in that the viscous, cotton or synthetic or cotton-colored ink is colored with NIR fluorescent dyes and / or pigments. polymer fibers with the addition of a fixing agent. Optical paper and printed matter protection according to claim 1, characterized in that an existing printing technique is used to apply the coating with added NIR fluorescent dyes and / or pigments. 9. Optical paper and printed matter protection according to claim 1, characterized in that a color or colored coating is applied to the printing with added NIR fluorescent dyes and / or pigments which are water-based, solvent or UV-dried. A method of performing optical paper and printing materials according to any one of the preceding claims 1 to 9, characterized in that, in the case of coloring the entire paper weight with NIR fluorescent pigments and / or dyes, they are added to the technological process of obtaining paper with optical protective to the entire paper mass, A method of performing optical paper and printing materials according to any one of the preceding claims 1 to 9, characterized in that in the case of the manufacture of paper with an optical protection only by a coating process containing NIR fluorescent pigments and / or dyes, adds NIR fluorescent pigments and / or dyes to the color or non-colored coating, and the paper can thus be pushed by existing printing techniques, the coating being water-based, solvent-based or UV-dried. A method of performing optical paper and printing materials according to any one of the preceding claims 1 to 9, characterized in that, in the case of coloring of protective fibers with NIR fluorescent pigments added to the paper with optical shields, they can be dyed with by the addition of a fixing agent, where, when fibers are dyed with NIR fluorescent dyes, the already known process of dyeing of fibers is used. A method for performing optical paper and printing materials according to any one of the preceding claims 1 to 9, characterized in that, in the case of coloring of the protective thread to be embedded in the paper, the protective thread is pushed with a color or non-colored coating, varnish or color to which NIR fluorescent pigments or dye, and then the thread is cut and embedded into the paper according to the known process, wherein the coating containing NIR fluorescent pigments and / or dyes can be printed with existing printing techniques and the coating can be on a water based, solvent-based or UV-dried coating. A method of performing the optical protection of paper and printed matter according to any one of the preceding claims 1 to 9, characterized in that, in the case of staining, the "blankets" are suitable for making "coatings" of a coating with a coating, with a lacquer or a color that is adding NIR fluorescent pigments and / or dyes to it, after which the Blanches are cut out and incorporated into the paper by a known process, wherein the coating containing NIR pigments and / or dyes can be printed with existing printing techniques and the coating can be water- solvent-based or UV-dried.