JP6914954B2 - A method of printing a substrate with a printing substance containing a metal pigment, and a substrate printed with a printing substance containing metal particles. - Google Patents

Description

The present invention relates to a method of printing a substrate with another printing substance containing metallic ink or a metal pigment, and a substrate printed with another printing substance containing metallic ink or metal particles.

Mirror effect or other metallic luster effect for high quality printing on cardboard, card paper, or paper when producing packaging materials or printed matter such as magazines, newspapers, books, catalogs, postcards, or calendars. Is often required. Applying metallic ink directly to cardboard or other (cellulose) fiber-containing flat materials does not produce satisfactory results. This is because the printed matter only reflects and shines dullly. A method is known in which a metal layer of a glossy foil is transferred to a substrate by using a hot foil method or a cold foil method, and these are further printed if necessary. In fact, these methods provide good mirror and gloss effects. However, these methods are cumbersome, prone to problems, and limit manufacturing speeds.

International Patent Application No. WO 01/07175A1 describes a method of producing a metallic appearance on paper or similar fibrous substrates. A base layer of UV curable liquid composition is applied to the surface of the substrate and at least partially cured. A water-based seal coat can be optionally applied to the base layer. Finally, the metallic liquid composition is applied to these base layers and an aqueous seal coat that may be on top of them, giving them a metallic appearance after drying. The metal composition is preferably a metallic ink. The base layer, the possible aqueous seal coat, and the metal composition are preferably overprinted. Printing the base layer and printing with a possible water-based seal coat increases manufacturing costs.

International Patent Application No. WO 2013/134359A1 describes a method of producing a printed matter, wherein an energy curable ink is applied to a substrate, the ink is cured, and a metallic ink is applied to the cured ink. Will be done. This method is carried out by a printing press. The appearance of this printed matter will be similar to foil stamping. Limiting the substrate by overprinting with energy-curable inks and metallic inks is a disadvantage.

From this, a potential problem in the present invention is to create a method of printing a substrate having a mirror effect or a metallic luster effect with an improved color design option, and to improve the color design option, a mirror effect or a metallic luster effect. Is to produce a printing substrate equipped with.

This problem is solved by the method according to claim 1. An advantageous embodiment of the method is specified in the dependent claims.

The present invention is a method of printing a substrate made of cardboard or another fiber-containing flat material on a printing press with a printing material containing a metal pigment, including the following steps:
-Printing the first printing substance on the substrate,
-Overprinting a second printing substance containing a colorant on the first printing substance,
-Overprinting a third printing substance containing a metal pigment on the second printing substance.

The first printing material is printed on the substrate in the method of the present invention. After printing the first printing substance, a second printing substance containing a colorant and not containing a metal pigment is additionally printed on the first printing substance. A third printing substance containing a metal pigment is overprinted on the second printing substance. The first printing material prevents absorption of the colored second printing material by the fibrous flat material and prevents attenuation of the associated color effect. According to one embodiment of the invention, the second printing material is a non-energy curable ink or varnish. This is an ink or varnish that dries, especially by evaporation, without the addition of energy using a radiation energy supply device. This reduces the complexity of the device. According to another embodiment, the second printing material is energy curable. This is an ink or varnish that adds energy and dries using a radiation energy supply device. The first printing substance and the second printing substance are bases on which a printing substance containing a metal pigment is applied. This base prevents the third printing material containing the metallic pigment from being absorbed by the fibrous flat material and the associated mirror or metallic luster effect from being reduced. Since the second printing material is itself colored, it comprises a portion of the entire colored appearance of the printing substrate. To this end, according to one embodiment, a third printing material is applied to the second printing material in a colorless or transparent matrix material with a corresponding low concentration metal pigment. Therefore, the color of the second printing substance is visible through the third printing substance. This metallic pigment imparts a mirror effect or a metallic luster effect to the color of the second printing substance. According to a further embodiment, a part of the area covered by the second printing material is overprinted here with the third printing material, so that the third printing material and the second uncovered by the third printing material are overprinted. The surface portion of the printed material is visible. Here, the third printing material may be transparent or non-transparent. According to a further embodiment, the color of the first printing material is also visible because the first printing material also contains a colorant and is only partially covered by the second printing material. Thus, a printing unit or varnishing unit that prints the first printing material is also used for the color composition of the substrate. According to a further embodiment, a first printing material containing a plurality of different colorants is printed on the substrate and at least one second printing material is overprinted on the various first printing materials. The first printing material is only partially covered by the second printing material, and the various colors of the first printing material are additionally visible. According to a further embodiment, a second printing material containing a plurality of different colorants is overprinted on at least the first printing material, and a third printing material containing one or more different metal pigments is a different second. It is overprinted on the printing material of 2. When the third printing material is transparent, the various colors of the second printing material are visible through the third printing material. Since only a part of the area covered by the second printing material is overprinted with the third printing material, the color of the second printing material is visible together with the third printing material. According to a further embodiment, a plurality of third printing materials containing metal pigments are overprinted on at least one second printing material. Various mirror effects or metallic luster effects can be achieved in this way. Therefore, the method of the present invention improves the mirror surface effect or metallic luster effect and the color composition of the substrate.

The base material is preferably thick paper, (stage) cardboard, or paper. However, the substrate may be another (cellulose) fiber-containing material. In particular, the substrate may be coated paper, (tiered) cardboard, or thick paper, where at least the printed surface is thick paper, (tiered) cardboard, or (cellulose) fiber-containing material paper. The opposite side of the printed surface, or at least one intermediate layer, is made up of another material, such as a plastic layer or metal foil.

According to a preferred embodiment, the substrate is a packaging cardboard.

According to an advantageous embodiment, the first printing material is a first of chromatic colors (blue, green, yellow, red, etc.) or achromatic colors (black, white, or a mixture thereof, that is, gray scale tones). An ink, or a chromatic or achromatic first varnish, or a transparent varnish, and / or a second printing material, a chromatic or achromatic second ink, or a chromatic or achromatic second. The second varnish and / or the third printing material is a third ink containing a metal pigment or a third varnish containing a metal pigment. According to a further embodiment, the first ink is a printing ink and / or the second ink is a second printing ink and / or the third ink is a third printing ink. Is. According to a further embodiment, the first ink is the first printing varnish and / or the second ink is the second printing varnish and / or the third ink is the third. It is a printing varnish.

The printing ink and printing varnish must be dried or cured on the substrate. There is a difference between a physical drying process by evaporation or ink penetration and a chemical drying process by polymerization (radiation curing) or oxidation.

Often dried by a combination of various physical and / or chemical drying treatments.

Printing inks essentially consist of colorants, adhesives, printing aids, additives, and carrier materials. Colorants are pigments or dyes of their respective colors, including black and white. These determine the chromaticity of the printing ink. Pigments are organic or inorganic, chromatic, black, or white substances (solid particles and / or molecularly aggregated particles) that are insoluble in carrier systems. In particular, foil-stamped gold and silver and aluminum pigments are used to make printing inks. Dyes are organic compounds that are dissolved in the carrier system during use and are present in molecular form. These are usually bonded directly to the surface of the substrate.

Conventional printing ink adhesives are generally resins that dissolve in mineral oil. The adhesive is thus dried on the substrate to fix the pigment. Auxiliary substances (additives) are added, in particular, to influence drying, flow properties, losses, and wear resistance. Carrier materials for colorants are generally diluents or solvents.

The composition of the printing ink varies depending on the printing process (gravure printing, flexographic printing, offset printing, screen printing, relief printing, or digital printing).

The radiation curable ink is an ultraviolet curable ink, an infrared curable ink, or an electron beam curable ink. This ink is cured by using ultraviolet, infrared, or electron beams. Therefore, the energy supply device is a radiation energy supply device including an ultraviolet source, an infrared source, or an electron beam source. The UV ink contains a monomer, a prepolymer, or an oligomer, a colorant, an additive, and a photopolymerization initiator. Under the influence of ultraviolet irradiation, the photopolymerization initiator is decomposed into radicals, and further radicals are generated by a chain reaction. Radicals react with monomers and prepolymers or oligomers to form three-dimensional crosslinked polymers. With electron beam curable inks, a photopolymerization initiator is not required because the electron beam acts directly on the reactive adhesive. Radiation energy supply devices are problematic and require a lot of maintenance.

In other printing inks, especially in offset printing, gravure printing, relief printing, or flexographic printing inks, drying occurs due to evaporation of volatile components. Volatile components are, in particular, alcohols, esters, ketones (generally for printing inks used in packaging), or toluene (generally for inks used in gravure printing for illustrations), solvent-free printing. For ink, it is water. Evaporation can occur without or with certain energy supply devices. The energy supply device is, for example, an air dryer that blows air onto the base material at an ambient temperature, or a warm air dryer that keeps the air higher than the ambient temperature and blows the air onto the base material.

The energy supply device is, in particular, a radiation energy supply device or a (warm air) air dryer, which may be installed behind the printing unit in the throughput direction of the substrate, or integrated with the printing unit to which ink is applied. May be converted.

During drying by ink penetration into the substrate, the film containing the liquid component of the printing ink and the colorant that seeps into the substrate remains on the top surface of the substrate.

Varnishes are especially used for finishing and protecting printed substrates.

The printing varnish is an oil-based overprinting varnish, a dispersed varnish, a dissolved varnish, or an ultraviolet varnish. The main components of the UV varnish are acrylate oligomers for cross-linking and viscous control, acrylate prepolymers for loss, hardness and abrasion resistance, and photopolymerization initiators for drying.

For more information on printing inks and printing varnishes, see Handbuch der Printmedia (English name: Manual for Print Media) by Helmut Kippan, ISBN 3-540-66941-8, pp. 134-149.

According to a preferred embodiment, the first printing material is UV ink or UV varnish. This is particularly effective in preventing the absorption of the second and third printing materials by the fiber-containing flat material. According to a further embodiment, the UV varnish is a UV varnish containing a colorant or a UV varnish containing no colorant (UV transparent varnish).

According to a further embodiment, the second printing material is a non-energy curable printing ink or non-energy curable printing varnish that dries without the use of a radiation energy supply device, especially by evaporation. According to a further embodiment, the non-energy curable printing ink or non-energy curable printing varnish dries without a (warm air) air dryer or other energy supply device.

According to a preferred embodiment, the second printing material is an ink for offset printing, gravure printing, relief printing, or flexographic printing, or an oil-based varnish, a dispersed varnish, or a dissolved varnish.

According to a further embodiment, the third printing material is a non-energy curable printing ink or printing varnish containing a metal pigment that dries without the use of a radiation energy supply device, especially by evaporation. An ink for offset printing, gravure printing, relief printing, or flexo printing, which contains a metal pigment, or an oil-based varnish containing a metal pigment, a dispersed varnish, or a dissolved varnish. According to a further embodiment, the non-energy curable printing ink or printing varnish containing the metal pigment dries with or without a (warm air) air dryer or another energy supply device.

According to a further embodiment, the first printing material is dried after printing, the second printing material is overprinted on the dried first printing material, and / or the second printing material is overprinted. It is later dried and the third printing material is overprinted on top of the dried second printing material. This is particularly effective in blocking the absorption of the second and third printing materials by the fiber-containing flat material. According to a further embodiment, the third printing material dries after overprinting. This is advantageous for overprinting the fourth printing material on the third printing material.

According to a further embodiment, the first print material is dried using the first radiation energy supply device or by evaporation or ink penetration and / or the second print material supplies the second radiation energy. The device is used or by evaporation and / or the third printed material is dried by using a third radiation energy supply device or by evaporation. It is possible to dry almost immediately by drying with a radiation energy supply device (ultraviolet source, infrared source, or electron beam source). Avoid radiation energy supply devices that are prone to problems and require intensive maintenance due to drying by evaporation or ink penetration. In addition, equipment costs can be reduced, especially if no (warm air) air dryer or other energy supply device is used.

According to a further embodiment, a fourth printing material (overprint) is printed on the first printing material and / or the second printing material and / or the third printing material. According to a further embodiment, the fourth printing material is a fourth printing ink or a fourth printing varnish. According to a further embodiment, the fourth printing material is a chromatic or achromatic ink or varnish, especially in the form of an inscription, symbol mark, image, or color area. According to a further embodiment, the fourth printing material is a protective varnish that protects the underlying material, or a texture coating agent that constitutes the surface of the material. The fourth printing material is preferably overprinted after being overprinted with the third printing material. The fourth printing material may extend over the entire exposed area of the first printing material and / or the second printing material and / or the third printing material, or only a part thereof.

According to a further embodiment, the fourth printing material is an energy-curable or non-energy-curable printing ink, or an energy-curable or non-energy-curable printing varnish. According to a further embodiment, the printing varnish is a chromatic printing varnish or a transparent varnish. According to a further embodiment, the printing varnish is an oil-based varnish, a dispersed varnish, or a dissolved varnish, or an ultraviolet varnish.

According to a further embodiment, the fourth printing material is overprinted after the first printing material and / or the second printing material and / or the third printing material has dried.

According to a further embodiment, the first printing material is directly overprinted on the substrate and / or the second printing material is directly overprinted on the first printing material and / or the third printing material. Is directly overprinted on the second printing material. By direct overprinting, the printing material is printed directly on the underlying printing material without an intermediate layer.

According to a further embodiment, this method is performed using opportunities for gravure printing, flexographic printing, offset printing, relief printing, screen printing, or digital printing. According to a further embodiment, this method is performed using a sheet-fed press or a web press. According to a further embodiment, the first printing material, the second printing material, the third printing material, and relatedly the fourth printing material are sequentially overprinted at various stations of the printing press. According to a further embodiment, the station for overprinting the printing ink is the printing unit. According to a further embodiment, the printing unit is one or more stations for overprinting the printing varnish. According to a further embodiment, one or more stations for overprinting the printing varnish are varnishing units. An additional station of the printing press may be configured by an energy supply device, particularly by a radiation energy supply device and / or a (warm air) dryer.

According to a further embodiment, the third print material containing at least one metal pigment is so low that it is visible through the third print material in at least one sub-region, in which sub-region the second print material is visible through the third print material. It is applied with colorability.

According to a further embodiment, a third printing material containing at least one metal pigment is invisible through the third printing material in at least one sub-region, in which sub-region the second printing material is invisible. It is applied with high colorability. The two embodiments described above can also be combined with each other, and various embodiments can be implemented in various subregions of the third printing material.

According to a further embodiment, the first printing material is printed on at least the first area of the substrate and at least one second printing material is overprinted on the first printing material only in at least one second area. Since the second region covers only a part of the first region, the first printing material is visible in the region not covered by the second printing material. Thus, the appearance of the printing substrate is also determined by the first printing material.

According to a further embodiment, the second printing material is overprinted on the first printing material in at least the second area, and the third printing material is printed on the second printing material in at least the third area. Since only the second area is overprinted and the third area covers only a part of the second area, the second printing material is visible in the area not covered by the third printing material. Thus, the appearance of the printing substrate is also determined by the second printing material.

According to a further embodiment, the second print material is overprinted over the entire area of the first print material and / or the third print material is overprinted over the entire area of the second print material.

The present invention further prints cardboard or another fiber-containing flat material in accordance with one of claims 1-10, or one of the aforementioned embodiments, and punches blanks for folding cartons. The method of making a blank for a folding carton, which is made from cardboard by one or more of the treatments of grooving, cutting, scoring, and engraving. According to a further embodiment, the blank is pre-folded and, if possible, pre-applied. According to a further embodiment, the folding carton is manufactured from a blank by sealing and, if possible, affixing.

Further, this problem is solved by the printing substrate according to claim 11. Advantageous embodiments of the printed substrate are specified in the dependent claims.

The printed substrate comprises:
Substrate made from cardboard or another fiber-containing flat material,
-The first printing substance printed on the above substrate,
A second printing substance that contains a colorant and is overprinted on the first printing substance and does not contain a metal pigment.
A third printing substance that contains a metal pigment and is overprinted on the second printing substance.

The above-mentioned advantageous effects identified by the method of claim 1 are brought to the printed substrate. Similarly, the aforementioned advantageous effects identified in the embodiments of the method are brought to the following embodiments of the printed substrate.

According to one embodiment, the first printing material is a chromatic (blue, green, yellow, red, etc.) or achromatic first ink, or a chromatic or achromatic first varnish, or first. And / or the second printing material is a chromatic or achromatic second ink, or a chromatic or achromatic second crocodile, and / or a third print. The substance is a third ink containing a metal pigment or a third varnish containing a metal pigment.

According to a further embodiment, a plurality of first printing materials are printed on the substrate.

According to a further embodiment, a plurality of second printing materials containing a colorant are overprinted on at least one first printing material.

According to a further embodiment, a plurality of third printing materials containing metal pigments are overprinted on at least one second printing material.

According to a further embodiment, a plurality of third printing materials containing metal pigments are overprinted on the second printing material immediately next to each other or at some distance from each other.

According to a further embodiment, the third print material is so low that the second print material is visible through the third print material in the sub-region on top of the second print material in at least one sub-region. Overprinted with colorability.

According to a further embodiment, the third print material is on top of the second print material in at least one sub-region, in which the second print material is invisible through the third print material. It is highly colored and overprinted.

According to a further embodiment, the first printing material is printed on at least the first area of the substrate and at least one second printing material is overprinted on the first printing material only in at least one second area. Since the second region covers only a part of the first region, the first printing material can be visually recognized from the outside in the region not covered by the second printing material.

According to a further embodiment, the second printing material is overprinted on the first printing material in at least the second area, and the third printing material is printed on the second printing material in at least the third area. Since only the second area is overprinted and the third area covers only a part of the second area, the second printing material can be visually recognized from the outside in the area not covered by the third printing material.

According to a further embodiment, at least one fourth printing material (overprint) is printed on the first printing material and / or the second printing material and / or the third printing material.

According to a further embodiment, the first printing material is directly overprinted on the substrate and / or the second printing material is directly overprinted on the first printing material and / or the third printing material. Is directly overprinted on the second printing material and / or the fourth printing material is directly overprinted on the third printing material.

Furthermore, the present object relates to a printing substrate produced by the method according to one of claims 1 to 10.

Finally, the present invention relates to a printing substrate manufactured according to an embodiment of the method specified above.

Finally, the present object relates to a blank for a folding carton made from cardboard or another printing substrate by the method according to one of claims 11-19. According to a further embodiment, the blank has one or more of the following structures: grooves, punched lines, cut lines, streaks, and engraved lines. According to a further embodiment, the blank is pre-folded and, if possible, pre-applied.

Finally, the subject of the present invention is a folding carton made from the aforementioned types of blanks.

Furthermore, the subject of the present invention is a method of printing a substrate made of cardboard or another fibrous flat material with metallic ink in a printing press having a plurality of printing units, including the following steps. :
-Printing energy-curable chromatic or achromatic inks directly onto the substrate using the first printing unit,
− Curing the energy-curable ink onto the substrate by applying energy to the energy-curable ink using an energy supply device.
-Using a second printing unit, overprinting metallic ink on top of the above chromatic or achromatic inks.

In the methods of the invention, instead of energy-curable colorless or transparent coatings, energy-curable chromatic inks (such as blue, green, yellow, or red) and achromatic inks (black, white, and The mixed color (grayscale tone) is printed directly on the substrate as a base layer as a basis for applying metallic ink. The base layer prevents the absorption of metallic ink by the fiber-containing flat material and the associated reduction in mirror effect or metallic luster effect. Since the base layer is itself colored, the base layer can be used to form part of the overall colored appearance of the overprint. To this end, metallic inks are applied to the base layer with the corresponding low concentrations of metallic pigments in colorless or transparent matrix materials. Therefore, chromatic or achromatic inks are visible through the metallic inks. Metallic pigments provide a metallic luster effect on chromatic or achromatic inks. Furthermore, since only a part of the area covered with the chromatic or achromatic ink can be printed with the metallic ink, the area not covered with the metallic ink and the chromatic or achromatic ink can be printed. It is visible. In the method of the present invention, the printing machine can be used more effectively, and labor and cost can be reduced.

The base material is preferably thick paper, (stage) cardboard, or paper. However, the substrate may be another (cellulose) fiber-containing material. In particular, the substrate may be coated paper, (tiered) cardboard, or thick paper, where at least the printed surface is thick paper, (tiered) cardboard, or (cellulose) fiber-containing material paper. The opposite side of the printed surface, or at least one intermediate layer, is made up of another material, such as a plastic layer or metal foil.

The printing machine may be a rotary printing machine or a sheet-fed printing machine. In both cases, gravure printing, flexographic printing, offset printing, or digital printing can be used as the printing method. This method is preferably used in gravure printing, especially in rotary presses or sheet-fed printing presses.

The energy curable ink is an ultraviolet curable, infrared curable, or electron beam curable ink. This ink is cured by using ultraviolet, infrared, or electron beams. This ink is preferably UV curable.

Therefore, the energy supply device is an ultraviolet source, an infrared source, or an electron beam source.

The energy-curable ink is printed directly on the substrate, i.e., there is no other layer between the energy-curable ink and the substrate.

Preferably, the metallic ink is applied to the cured chromatic or achromatic ink. Alternatively, metallic ink is applied to uncured or partially cured chromatic or achromatic ink, which is then fully cured. Preferably, the energy supply device is installed behind the first printing unit and in front of the second printing unit in the throughput direction of the substrate through the printing press.

The metallic ink is preferably transparent (colorless) and is preferably a varnish containing a metal pigment or another matrix material. The metal pigment is preferably aluminum, copper, brass, or another metal, or a mixture of a plurality of the aforementioned pigments.

According to one embodiment of the present invention, a plurality of various printing units are used to print a plurality of various metallic inks one after another on a chromatic or achromatic ink. Various metallic inks can be printed right next to each other, that is, with no space between them. However, various metallic inks can also be printed on top of chromatic or achromatic inks at intervals from each other.

According to a further embodiment, the energy-curable ink and the metallic ink can be printed while being simultaneously covered with the substrate.

According to a further embodiment, the energy curable ink and the metallic ink are printed on the substrate in continuous or distant regions.

According to a further embodiment, at least one metallic ink is overprinted directly on the chromatic or achromatic ink. According to another embodiment, a third printing unit is used to overprint a non-energy curable coating onto a chromatic or achromatic ink, and at least one metallic ink is overprinted onto the coating. .. The non-energy curable coating may be, in particular, another ink. Another ink may be, in particular, a further component of the colored appearance of the printed substrate. Preferably, the coating agent is overprinted on a cured chromatic or achromatic ink. Preferably, the coating is overprinted directly on the cured chromatic or achromatic ink and / or the metallic ink is overprinted directly on the coating.

According to a further embodiment, the metallic ink is applied to at least one subregion with a highly tinted, i.e., low concentration pigment so that the chromatic or achromatic ink beneath the metallic ink is the metallic ink. Invisible through.

According to a further embodiment, at least one metallic ink is applied to at least one sub-region with a low color, i.e., a low concentration of pigment, so that the underlying chromatic or achromatic ink is the metallic ink. Invisible through. In one embodiment, the cured red ink (or one of the other colors) is covered with an ink of low color aluminum particles (or other metal particles), so that the overall red (or another color) metal A glossy coating is produced. Since embodiments with highly or less tinted metallic inks can be combined with each other, the subregions of the chromatic or achromatic inks are coated with the highly tinted metallic inks to provide another chromatic color. Alternatively, in the sub-region of the achromatic ink, a low color metallic ink is applied.

According to a further embodiment, the energy curable ink is printed on the first area of the substrate and at least one metallic ink is overprinted only on at least one second area on top of the chromatic or achromatic ink. And since the second region covers only a part of the first region, the cured chromatic or achromatic inks are visible adjacent to each other. Even in this embodiment, the cured chromatic or achromatic ink is a component of the colored appearance of the printing substrate.

Embodiments in which the cured chromatic or achromatic ink is visible through the low color metallic ink and the cured chromatic or achromatic ink is directly visible next to the metallic ink are also mutually visible. Can be combined.

According to a further embodiment, overprinting on preferably cured, chromatic or achromatic inks and / or metallic inks is performed using at least one separate printing unit. Overprinting may be performed specifically on color areas, images, inscriptions, or symbol marks. Overprinting comprises one or more other inks, a protective varnish, or a varnish that constitutes the surface of the printing substrate. Overprinting can be performed entirely or partially on, preferably cured, chromatic or achromatic inks, or on non-energy curable coatings overprinted on top of it. It is possible to overprint all or part of metallic ink.

Furthermore, the subject of the present invention is a printing substrate comprising:
-With a substrate made from cardboard or another fiber-containing flat material,
-Energy-curable chromatic or achromatic inks that are printed directly on the substrate,
-Metallic ink that is overprinted on top of the above chromatic or achromatic inks.

The above-mentioned advantageous effects identified by the above-mentioned methods from the 7th paragraph on page 15 to the 2nd paragraph on page 20 are brought to the printed substrate. This is also applicable to the following advantageous embodiments of the printing substrate.

According to one embodiment, multiple inks are printed directly on top of chromatic or achromatic inks, right next to each other or spaced next to each other.

According to a further embodiment, at least one metallic ink is overprinted directly on the chromatic or achromatic ink in at least one subregion.

According to a further embodiment, a non-energy curable coating is overprinted on a chromatic or achromatic ink in one subregion, and a metallic ink is overprinted on the coating.

According to a further embodiment, in at least one subregion, the metallic ink is so highly colored that the layer beneath the metallic ink is invisible through the metallic ink on top of the chromatic or achromatic ink. Overprinted by sex.

According to a further embodiment, in at least one subregion, the metallic ink is visible over the chromatic or achromatic ink, and the chromatic or achromatic ink beneath the metallic ink is visible through the metallic ink. It is overprinted with moderately low coloration.

According to a further embodiment, a chromatic or achromatic ink is printed on the first area of the substrate and at least one metallic ink covers only a part of the first area. Since it is printed on the area, the area of the metallic ink and the chromatic or achromatic ink not covered with the metallic ink is visible from the outside.

According to a further embodiment, overprinting is performed on chromatic or achromatic inks and / or metallic inks.

According to a further embodiment, the method is described in any one of claims 1-10, or the embodiment thereof is a third paragraph from pages 3 to 12 and a paragraph 7 to 20 on page 15. It has at least one feature of the methods described in paragraph 2. According to a further embodiment, the printed substrate is described in any one of claims 11 to 19, or the embodiments thereof are from page 12, paragraphs 4 to 15, paragraph 6, and page 20, paragraph 3. It has at least one feature of the printing substrate described in page 21, paragraph 6.

The present invention will be described below based on the accompanying drawings of preferred embodiments.

FIG. 5 is a cross-sectional view of the first printing substrate perpendicular to the surface of the flat material. FIG. 5 is a cross-sectional view of the second printing substrate perpendicular to the surface of the flat material.

FIG. 1 is a diagram showing an embodiment of the present invention described in the second paragraph on page 14 to the first paragraph on page 20.

According to FIG. 1, the printing substrate 1 has a substrate 2 made of cardboard or another fiber-containing foldable flat material. The printed surface 3 of the base material 2 is made of a fiber-containing material.

Then, the energy-curable ink 4 is printed directly on the printing surface 3 of this base material. The energy curable ink 4 is a chromatic or achromatic ink. This is, for example, a Liquid Cast Curing (LCC) ink. This is preferably a UV curable ink.

The metallic ink 5 is overprinted on the cured ink 4. In this example, this is a metallic ink 5 containing a silver pigment.

In one or more layers, additional chromatic or achromatic ink 6 is overprinted on top of the metallic ink 5.

Finally, the protective varnish 7 is overprinted on the top surface, which is, for example, an acrylic varnish.

It is preferable that the base material 2 is printed using a printing machine provided with a plurality of printing units. Since the energy-curable ink 4 is a chromatic or achromatic ink, the ink 4 can be used together to form the colored appearance of the printing substrate 1. For this reason, the layers 6 and 7 applied on the energy curable ink 4 may be wholly or partially transparent and / or the cured ink 4 is partially exposed. , Each may only be covered with a transparent, colorless protective varnish 7. Therefore, all printing units of the printing press can be used for color printing.

The second embodiment differs from the above-described embodiment in that the second different ink 8 is printed over the energy-curable first ink 4. The second ink is preferably an ink that dries by evaporation during the manufacturing process. A third metal ink 5 is overprinted on top of the second ink.

Since the first ink 4 can be exposed next to the second ink 8, the first ink 4 is visible from the outside.

Since the second ink 8 can be exposed next to the third ink 5, the second ink 8 is visible from the outside.

In one or more layers, additional chromatic or achromatic ink 6 is applied over the metal third ink 5 and in the possible exposed areas of the first ink 4 and / or the second ink 8. It is overprinted.

Finally, a clear, colorless protective varnish 7 is placed on top of the fourth ink 6 and in the possible exposed areas of the first ink 4 and / or the second ink 8 and / or the third ink 5. It is overprinted.

Claims (19)

A method of printing a substrate made of cardboard or another fiber-containing flat material on a printing press with a printing material containing a metal pigment, comprising the following steps:
-Printing the first printing substance on the substrate,
-Overprinting a second printing substance containing a colorant and not containing a metal pigment on the first printing substance,
-Overprinting a third printing substance containing a metal pigment on the second printing substance. The first printing material is a chromatic or achromatic first ink, or a chromatic or achromatic first varnish, or a first transparent varnish, and / or the second printing. A third ink in which the material is a chromatic or achromatic second ink, or a chromatic or achromatic second varnish, and / or the third printing material contains a metal pigment. The method according to claim 1, which is a third varnish containing a metal pigment. The first printing material dries after printing, the second printing material is overprinted on the dried first printing material, and / or the second printing material dries after overprinting. The third printing material is overprinted on the dried second printing material, and / or the third printing material is dried after the overprinting, according to claim 1 or 2. Method. Any one of claims 1 to 3, wherein the fourth printing material is overprinted on the first printing material and / or the second printing material and / or the third printing material. The method described in the section. The method according to claim 4, wherein the fourth printing material is overprinted after the first printing material and / or the second printing material and / or the third printing material is dried. The first printed material is dried by using a first radiation energy supply device or by evaporation, and / or the second printed material is dried by using a second radiation energy supply device or by evaporation. The method according to any one of claims 1 to 5, wherein the printed material is dried and / or the third printed substance is dried using a third radiation energy supply device or by evaporation. The third printing substance containing at least one metal pigment is in at least one sub-region, and in the sub-region, the second printing substance is so low in colorability that it can be visually recognized through the third printing substance. The method according to any one of claims 1 to 6, which is applied. The third printing substance containing at least one metal pigment is in at least one sub-region, and the second printing substance is invisible through the third printing substance in the sub-region. The method according to any one of claims 1 to 7, which is applied in 1. The first printing material is printed on at least the first area of the substrate, and the at least one second printing material is overprinted on the first printing material only in at least one second area. Since the second region covers only a part of the first region, the first printing material is visible in the region not covered by the second printing material, claims 1 to 8. The method according to any one of the above. The second printing material is overprinted on the first printing material in at least a second area, and the third printing material is overlaid on the second printing material only in at least a third area. Since the third region is printed and covers only a part of the second region, the second printing material is visible in the region not covered by the third printing material. Item 8. The method according to any one of Items 1 to 9. It is a printing base material
A substrate (2) made from cardboard or another fiber-containing flat material,
-The first printing substance (4) printed on the base material (2) and
A second printing substance (8) containing a colorant and not containing a metal pigment, which is overprinted on the first printing substance (4).
A third printing substance (5) that contains a metal pigment and is overprinted on the second printing substance (8).
A printing substrate. The first printing material (4) is a chromatic or achromatic first ink, or a chromatic or achromatic first varnish, or a first transparent varnish, and / or the first. The printing material (8) of 2 is a chromatic or achromatic second ink, or a chromatic or achromatic second varnish, and / or the third printing material (5) is a metal. The printing substrate according to claim 11, which is a third ink containing a pigment or a third varnish containing a metal pigment. 11. The printing substrate according to. The third printing substance (5) is placed on the second printing substance (8) in the sub-region, and in the sub-region, the second printing substance (8) is placed on the third printing substance (5). The printing substrate according to claim 11, wherein the printing substrate is overprinted with low colorability so that it can be visually recognized through the printing substrate. The third printing substance (5) is placed on the second printing substance (8) in the sub-region, and in the sub-region, the second printing substance (8) is placed on the third printing substance (5). The printing substrate according to claim 11, wherein the printing substrate is overprinted with a high colorability that cannot be visually recognized through the printing substrate. The first printing material (4) is overprinted on at least the first region of the base material (2), and the at least one second printing material (8) is at least on the first printing material (4). Since only one second region is overprinted and the second region covers only a part of the first region, the region not covered by the second printing substance (8) is described as described above. The printing substrate according to any one of claims 11 to 15, wherein the first printing substance (4) is visible from the outside. The second printing material (8) is overprinted on the first printing material (4) in at least a second region, and the third printing material (5) is the second printing material (8). ) Is overprinted only on at least the third region, and the third region covers only a part of the second region, so that the region is not covered by the third printing substance (5). The printing substrate according to any one of claims 11 to 16, wherein the second printing substance (8) is visible from the outside. A fourth printing material (6, 7) is placed on the first printing material (4) and / or the second printing material (8) and / or the third printing material (5). The printing substrate according to any one of claims 11 to 17, which is overprinted. A printing substrate produced by the method according to any one of claims 1 to 10.

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