阅读说明：本技术 磁性光变油墨的印刷方法 (Printing method of magnetic optically variable ink ) 是由 刘杰 冯多 于 2020-12-03 设计创作，主要内容包括：本发明公开了一种磁性光变油墨的印刷方法,包括以下步骤：将UV光固油墨和磁性涂料混合在一起,形成磁性光变油墨；将所述磁性光变油墨涂覆在承印物上；利用紫外激光束对所述承印物上的磁性光变油墨进行局部固化,局部固化的磁性光变油墨形成第一信息；对所述承印物上的磁性光变油墨进行磁定向,磁定向的磁性光变油墨形成第二信息；固化所述承印物上的磁性光变油墨。本发明的磁性光变油墨的印刷方法能够增加印刷信息,丰富视觉效果,提升防伪性能。(The invention discloses a printing method of magnetic optically variable ink, which comprises the following steps: mixing UV light-curable ink and magnetic paint together to form magnetic light-variable ink; coating the magnetic optically variable ink on a printing stock; carrying out local curing on the magnetic optically variable ink on the printing stock by using an ultraviolet laser beam, wherein the locally cured magnetic optically variable ink forms first information; carrying out magnetic orientation on the magnetic optically variable printing ink on the printing stock, wherein the magnetic optically variable printing ink with the magnetic orientation forms second information; and curing the magnetic optically variable ink on the printing stock. The printing method of the magnetic optically variable ink can increase printing information, enrich visual effect and improve anti-counterfeiting performance.)

1. The printing method of the magnetic optically variable ink is characterized by comprising the following steps of:

mixing UV light-curable ink and magnetic paint together to form magnetic light-variable ink;

coating the magnetic optically variable ink on a printing stock;

carrying out local curing on the magnetic optically variable ink on the printing stock by using an ultraviolet laser beam, wherein the locally cured magnetic optically variable ink forms first information;

carrying out magnetic orientation on the magnetic optically variable printing ink on the printing stock, wherein the magnetic optically variable printing ink with the magnetic orientation forms second information;

and curing the magnetic optically variable ink on the printing stock.

2. The printing method of the magnetic optically variable ink according to claim 1, wherein the magnetic optically variable ink is coated on the substrate by spraying, gravure printing or screen printing.

3. The printing method of the magnetic optically variable ink according to claim 1, wherein the magnetic coating is a mica sheet coated with ferric oxide or ferroferric oxide.

4. The printing method of the magnetic optically variable ink according to claim 1, wherein the magnetic coating is an iron sheet.

5. The printing method of the magnetic optically variable ink according to claim 1, wherein the magnetic paint is present in an amount of 10 to 20% by mass of the magnetic optically variable ink.

6. The printing method of magnetic optically variable ink according to claim 1, wherein the ultraviolet laser beam is generated by a laser device, the laser device comprises a laser head and a vibrating mirror, the laser head is used for emitting the ultraviolet laser beam, and the vibrating mirror is used for changing the irradiation direction of the ultraviolet laser beam.

7. The printing method of magnetic optically variable ink according to claim 1, wherein the magnetic optically variable ink on the substrate is magnetically oriented by a fixed magnetic cylinder.

8. The printing method of the magnetic optically variable ink according to claim 7, wherein the thickness of the substrate is 1 to 4 mm.

9. The printing method of magnetic optically variable ink according to claim 7, wherein a plurality of electromagnets are distributed in an array on the outer circumferential surface of the fixed magnetic cylinder.

10. The printing method of the magnetic optically variable ink according to claim 1, wherein the magnetic optically variable ink on the substrate is cured by an LED lamp capable of emitting ultraviolet rays.

Technical Field

The invention relates to the field of printing, in particular to a printing method of magnetic optically variable ink.

Background

Magnetic optically variable inks were first developed by SICPA of Switzerland, which was formally applied to currency by pulverizing five layers of optically variable plating structures having a symmetrical structure to form Optically Variable Pigments (OVP) to obtain Optically Variable Inks (OVI), and by being combined with printing techniques, the optically variable inks were formally marketed in 6 months of 1987. As the further development of the optically variable ink, other two-line anti-counterfeiting elements are introduced, for example, magnetic elements are added into the structure of the existing optically variable pigment, so that the optically variable pigment flake has the angular color changing function and the magnetic characteristic at the same time, the anti-counterfeiting technology of the optically variable ink is upgraded, and the magnetic optically variable ink (OVMI) is formed. The magnetic optically variable ink integrates the characteristics of the magnetic ink and the optically variable ink into a whole, so that optically variable colors have a flowing effect, the light and shade change is more obvious, and the anti-counterfeiting requirement can be met.

In the related technology, after the magnetic optically variable ink is printed, the flowing change and the light and shade change of single information (such as characters or patterns) can be generally realized, the visual effect is single, and the anti-counterfeiting performance needs to be enhanced.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the printing method of the magnetic optically variable ink provided by the invention can increase printing information, enrich visual effect and improve anti-counterfeiting performance.

The printing method of the magnetic optically variable ink according to the embodiment of the first aspect of the invention comprises the following steps: mixing UV light-curable ink and magnetic paint together to form magnetic light-variable ink; coating the magnetic optically variable ink on a printing stock; carrying out local curing on the magnetic optically variable ink on the printing stock by using an ultraviolet laser beam, wherein the locally cured magnetic optically variable ink forms first information; carrying out magnetic orientation on the magnetic optically variable printing ink on the printing stock, wherein the magnetic optically variable printing ink with the magnetic orientation forms second information; and curing the magnetic optically variable ink on the printing stock.

The printing method of the magnetic optically variable ink provided by the embodiment of the invention has at least the following beneficial effects: the magnetic optically variable printing ink on the printing stock is locally cured by ultraviolet laser before magnetic orientation, so that first information (such as characters or patterns) is formed, magnetic paint in the first information is not influenced by a magnetic field in a subsequent magnetic orientation process, therefore, the first information is inserted or combined in second information (such as flowing characters or patterns, brightness change and the like) formed in subsequent magnetic orientation, the first information and the second information are combined, more abundant information can be expressed, the visual effect is more abundant, the information is not easy to copy, and the anti-counterfeiting performance is improved.

According to some embodiments of the invention, the magnetic optically variable ink is applied on the substrate by spraying, gravure printing or screen printing.

According to some embodiments of the invention, the magnetic coating is mica sheets coated with ferric oxide or ferroferric oxide.

According to some embodiments of the invention, the magnetic paint is iron flakes.

According to some embodiments of the present invention, the magnetic paint is 10% to 20% by mass of the magnetic optically variable ink.

According to some embodiments of the invention, the ultraviolet laser beam is generated by a laser device comprising a laser head for emitting the ultraviolet laser beam and a galvanometer for changing an irradiation direction of the ultraviolet laser beam.

According to some embodiments of the invention, the magnetic optically variable ink on the substrate is magnetically oriented by a fixed magnetic cylinder.

According to some embodiments of the invention, the substrate has a thickness of 1 to 4 mm.

According to some embodiments of the invention, the outer circumferential surface of the fixed magnetic cylinder is arrayed with a plurality of electromagnets.

According to some embodiments of the invention, the magnetic optically variable ink on the substrate is cured by an LED lamp, the LED lamp being capable of emitting ultraviolet light.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further described with reference to the following figures and examples, in which:

FIG. 1 is a flow chart of a printing method of magnetic optically variable ink according to an embodiment of the present invention;

fig. 2 is a first message printed by a printing method of magnetic optically variable ink according to an embodiment of the present invention;

fig. 3 is another first information printed by the printing method of the magnetic optically variable ink according to the embodiment of the invention.

Reference numerals: the first information 100.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Referring to fig. 1 and 2, a printing method of magnetic optically variable ink according to an embodiment of the present invention includes the steps of: mixing UV light-curable ink and magnetic paint together to form magnetic light-variable ink; coating the magnetic optically variable ink on a printing stock; the method comprises the steps that an ultraviolet laser beam is utilized to carry out local curing on magnetic optically variable printing ink on a printing stock, and the locally cured magnetic optically variable printing ink forms first information 100; carrying out magnetic orientation on the magnetic optically variable printing ink on the printing stock, wherein the magnetic optically variable printing ink with the magnetic orientation forms second information; and curing the magnetic optically variable ink on the printing stock.

The magnetic optically variable ink on the printing stock is locally cured by ultraviolet laser before magnetic orientation, so that first information 100 (such as characters or patterns) is formed, and the magnetic coating in the first information 100 is not influenced by a magnetic field in a subsequent magnetic orientation process. Therefore, the first information 100 is inserted or combined in the second information (such as flowing characters or patterns, brightness change and the like) formed in the subsequent magnetic orientation, the first information 100 and the second information are combined, richer information can be expressed, the visual effect is richer, the information is not easy to copy, and the anti-counterfeiting performance is improved.

Referring to fig. 2 and 3, the first information 100 in fig. 2 is a petal-shaped pattern, and the first information 100 in fig. 3 is a hexagram-shaped pattern. The magnetic coating corresponding to the first information 100 region is not magnetically oriented and is therefore different from the subsequent magnetically oriented magnetic coating, and thus the first information 100 is significantly different from the second information.

In some embodiments of the invention, the magnetic optically variable ink is applied to the substrate by spraying, gravure printing or screen printing. The process of coating the magnetic optically variable ink on the printing stock is not limited, and a proper process can be selected according to production conditions, so that the implementation of the printing method of the magnetic optically variable ink is easier and more flexible.

In some embodiments of the present invention, the magnetic coating is mica sheets coated with ferric oxide or ferroferric oxide. The outer surface of the mica sheet is wrapped with ferric oxide or ferroferric oxide, and the ferric oxide or the ferroferric oxide can be acted and influenced by a magnetic field so as to influence the orientation of the mica sheet. The mica sheets are arranged regularly and obliquely, so that the effect of light and shade change can be obtained when the mica sheets are observed at different angles.

In some embodiments of the invention, the magnetic coating is iron flakes. The magnetic paint can also be iron sheets ground into a certain size, and the iron sheets are directly influenced by a magnetic field and are arranged orderly. When the iron sheet is observed from different angles, the effect of light and shade change can be obtained.

In some embodiments of the present invention, in the magnetic optically variable ink, the mass ratio of the magnetic coating is 10% to 20%, and correspondingly, the mass ratio of the UV optically curable ink is 80% to 90%. For example, the mass ratio of the magnetic paint is 10%, and the mass ratio of the UV light-curable ink is 90%; or the mass percentage of the magnetic coating is 15%, and the mass percentage of the UV light-cured printing ink is 85%; or the mass percentage of the magnetic coating is 20%, and the mass percentage of the UV light-cured ink is 80%.

Since the magnetic paint is mixed in the magnetic optically variable ink, the rheological property of the magnetic optically variable ink is lower than that of the original UV light-cured ink, and therefore, the proportion of the magnetic paint and the UV light-cured ink needs to be controlled. Wherein, the mass percentage of the magnetic paint is 10-20% which is a proper range, the rheological property of the magnetic light variable ink is better, and the amount of the magnetic paint can also meet the use requirement.

When the magnetic optically variable ink is prepared, the viscosity and the dryness of the magnetic optically variable ink need to be controlled so as to achieve the degree suitable for printing.

In some embodiments of the present invention, the ultraviolet laser beam is generated by a laser device including a laser head for emitting the ultraviolet laser beam and a galvanometer for changing an irradiation direction of the ultraviolet laser beam. The first information is generally a pattern or a character, so that the ultraviolet laser beam needs to change the irradiation position on the printing material to cure the magnetic optically variable ink at different positions, and finally the first information is formed. The propagation direction of the ultraviolet laser beam is rapidly changed by using the vibrating mirror shell, so that the magnetic optically variable printing ink at different positions on the printing stock is cured to form first information, the curing time can be shortened, and the production efficiency is improved.

In addition, the ultraviolet laser beam has strong directivity, can accurately irradiate a certain point of the printing stock, and has high curing precision. Meanwhile, the ultraviolet laser beam also has the characteristic of high energy property, and can quickly solidify the magnetic light-variable printing ink.

In some embodiments of the invention, the magnetic optically variable ink on the substrate is magnetically oriented by a fixed magnetic roller. The fixed magnetic roller is fixed with magnets in an arrangement mode, and after the fixed magnetic roller rolls, the fixed magnetic roller can quickly carry out magnetic orientation on the printing stock bypassing the fixed magnetic roller, so that the consistent production rhythm can be ensured, and the production efficiency is improved.

In a further embodiment of the invention, the thickness of the substrate is 1 to 4 mm. In particular, the thickness of the substrate may be 1mm, 2mm, 2.5mm or 4 mm. The printing stock is arranged to be thinner, so that the influence of the printing stock on a magnetic field can be reduced, and the magnetic orientation effect is ensured.

In a further embodiment of the invention, the outer circumferential surface of the fixed magnetic cylinder is arrayed with a plurality of electromagnets. Therefore, the distribution of the magnetic field can be changed by simply switching on and off, so that different first information is generated, the adaptability of the fixed magnetic roller is strong, the fixed magnetic roller does not need to be frequently replaced, and the production cost is low.

In some embodiments of the invention, the magnetic optically variable ink on the substrate is cured by an LED lamp, which is capable of emitting ultraviolet light. The LED lamp is a more common lamp, and the curing of the magnetic optically variable ink on the printing stock can be rapidly completed by using the LED lamp capable of emitting ultraviolet rays, so that the locking of the second information is completed. The LED lamp capable of emitting ultraviolet rays is low in acquisition cost, and the cost for implementing the printing method of the magnetic light-variable ink can be reduced.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.