CN112976869A

CN112976869A - Anti-counterfeiting element, manufacturing method and device, manufacturing method of magnetic ink and medium

Info

Publication number: CN112976869A
Application number: CN202110286857.4A
Authority: CN
Inventors: 刘�东; 李春芝; 辛科; 赵红梅; 李欢; 刘卫东; 杨秀菊
Original assignee: China Banknote Printing Technology Research Institute Co ltd; China Banknote Printing and Minting Corp
Current assignee: China Banknote Printing Technology Research Institute Co ltd; China Banknote Printing and Minting Corp
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-06-18

Abstract

The invention provides an anti-counterfeiting element, a manufacturing method and a manufacturing device thereof, a manufacturing method of magnetic ink and a medium. The manufacturing method of the anti-counterfeiting element comprises the steps of controlling a spraying device to spray magnetic ink on a printing stock; and controlling ultraviolet curing light to irradiate the printing stock through the pictures and texts on the light guide plate. Wherein, the picture and text on the light guide plate can be changed at least one kind. This application changes through setting up the picture and text on the light guide plate for ultraviolet curing light can shine the different regions of stock through the picture and text, and then the magnetic ink in different regions on the solidification stock, has realized printing different pictures and texts on the stock, need not to change the light guide plate, and easy operation practices thrift anti-fake element's cost of manufacture, improves anti-fake element's preparation efficiency.

Description

Anti-counterfeiting element, manufacturing method and device, manufacturing method of magnetic ink and medium

Technical Field

The invention relates to the technical field of anti-counterfeiting, in particular to a method for manufacturing an image-text variable anti-counterfeiting element, a method for manufacturing magnetic ink, an image-text variable anti-counterfeiting element, a device for manufacturing the image-text variable anti-counterfeiting element and a readable storage medium.

Background

In the related technology, different pictures and texts are printed on a printing stock by replacing the mask plate, so that the printing efficiency is reduced, and the printing cost is increased.

Disclosure of Invention

The present invention is directed to solving at least one of the above problems.

Therefore, the first purpose of the invention is to provide a method for manufacturing the anti-counterfeiting element with variable pictures and texts.

The second objective of the invention is to provide a method for manufacturing magnetic ink.

The third purpose of the invention is to provide a variable-pattern anti-counterfeiting element.

The fourth purpose of the invention is to provide a device for manufacturing the anti-counterfeiting element with variable pictures and texts.

A fifth object of the present invention is to provide a readable storage medium.

In order to realize the first purpose of the invention, the technical scheme of the invention provides a method for manufacturing an image-text variable anti-counterfeiting element, which comprises the steps of controlling a spraying device to spray magnetic ink on a printing stock; controlling ultraviolet curing light to irradiate the printing stock through the pictures and texts on the light guide plate; wherein, the picture and text on the light guide plate can be changed at least one kind.

According to the technical scheme, the pictures and texts on the light guide plate can be changed in at least one mode, and then the pictures and texts on the light guide plate are controlled to be changed, so that different areas of a printing stock can be irradiated by ultraviolet curing light, and then the magnetic ink in the different areas is cured, different pictures and texts are printed on the printing stock, the light guide plate does not need to be replaced, the operation is simple, the manufacturing cost of the picture and text variable anti-counterfeiting element is saved, and the manufacturing efficiency of the picture and text variable anti-counterfeiting element is improved.

In addition, the technical solution provided by the above technical solution of the present invention may further have the following additional technical features:

in the technical scheme, the magnetic ink can change color under the action of magnetic force before being irradiated by ultraviolet curing light.

The magnetic ink in the technical scheme can change color under the action of magnetic force, so that the magnetic ink can present different colors through different magnetic forces, the color printing of the magnetic ink is realized, the operation is simple, and the manufacturing cost of the anti-counterfeiting element with variable pictures and texts is reduced.

In any of the above technical solutions, before the step of controlling the ultraviolet curing light to irradiate the printing material through the image-text on the light guide plate, or while the step of controlling the ultraviolet curing light to irradiate the printing material through the image-text on the light guide plate, the method further includes: applying a magnetic force to the substrate having a magnetic force value of a first magnetic force value.

In the technical scheme, the magnetic force with the first magnetic force value is applied to the printing stock, so that the magnetic ink on the printing stock can change in color corresponding to the first magnetic force value under the action of the magnetic force with the first magnetic force value. The ultraviolet curing light is controlled to irradiate the printing stock through the pictures and texts on the light guide plate, so that the magnetic ink corresponding to the pictures and texts on the printing stock is cured into the color corresponding to the first magnetic force value, the operation is simple, and the color printing of the picture and text variable anti-counterfeiting element is realized.

In any of the above technical solutions, the printing material includes a first area corresponding to the image and text, and the control of the ultraviolet curing light to irradiate the printing material through the image and text on the light guide plate specifically includes: and controlling ultraviolet curing light to irradiate the first area of the printing stock through the pictures and texts on the light guide plate.

In the technical scheme, the first area of the printing stock corresponds to the image-text of the light guide plate. The ultraviolet curing light irradiates the first area of the printing stock through the pictures and texts on the light guide plate, namely, the areas of the printing stock corresponding to the pictures and texts of the light guide plate are cured, so that the ultraviolet curing light can cure different areas of the printing stock in a targeted manner, and the applicability of the manufacturing method of the picture and text variable anti-counterfeiting element is improved.

In any of the above solutions, the first magnetic force value is determined according to the color of the magnetic ink in the first area.

According to the technical scheme, the magnetic ink can change in different colors under the action of different magnetic force values, and then the first magnetic force value is determined according to the color of the magnetic ink in the first area, so that the magnetic ink in the first area can be cured into a preset color, and the flexibility of the manufacturing method of the image-text variable anti-counterfeiting element is improved.

In any of the above technical solutions, the printing material further includes a second area, and after the step of controlling the ultraviolet curing light to irradiate the printing material through the image-text on the light guide plate, the printing material further includes: applying a magnetic force with a second magnetic force value to the printing stock; controlling the ultraviolet curing light to irradiate the second area of the printing stock; wherein the second region is a sprayed region of magnetic ink.

According to the technical scheme, the magnetic force with the second magnetic force value is applied to the printing stock, so that the magnetic ink in different areas on the printing stock can be in different colors, and the reliability of the image-text variable anti-counterfeiting element is improved.

In any of the above solutions, the second magnetic force value is determined according to the color of the magnetic ink in the second area.

According to the technical scheme, the second magnetic force value is determined according to the color of the magnetic ink in the second area, so that the magnetic ink in the second area can change in preset color under the action of the second magnetic force value, and the applicability of the manufacturing method of the image-text variable anti-counterfeiting element is improved.

In any of the above technical solutions, the liquid crystal molecules are controlled to rearrange to change the graphics on the light guide plate; and/or controlling the angle change of at least one reflector to change the pictures and texts on the light guide plate; and/or controlling the digital printing device to change the pictures and texts on the light guide plate so as to obtain the pictures and texts which can be changed in at least one way.

In the technical scheme, the patterns and texts on the light guide plate are changed by controlling the rearrangement of the liquid crystal molecules, so that the liquid crystal molecules of the light guide plate can reflect the ultraviolet curing light with different patterns and texts, the conversion efficiency of the patterns and texts on the light guide plate is improved, the continuous change of the patterns and texts on the light guide plate is realized, and the manufacturing time of the anti-counterfeiting element with variable patterns and texts is further shortened.

According to the technical scheme, the pattern and text on the light guide plate can be changed by controlling the angle change of the at least one reflector, and the ultraviolet curing light with different pattern and text shapes is reflected to the printing stock through different angles of the reflector on the light guide plate, so that the light guide plate can realize printing of various patterns and texts, and the manufacturing cost of the pattern and text variable anti-counterfeiting element is reduced.

In the technical scheme, the image and text on the light guide plate can be changed in a digital printing mode, the operation is simple, the realization is easy, and the manufacturing cost of the image and text variable anti-counterfeiting element is reduced.

In any of the above technical solutions, the magnetic ink is magnetic optically variable ink and/or magnetic photonic crystal ink.

The magnetic ink in the technical scheme can be magnetic optically variable ink and/or magnetic photonic crystal ink, so that the magnetic ink can change color under the action of magnetic force, and the use flexibility of the image-text variable anti-counterfeiting element is improved.

In any of the above technical solutions, the particle size range of the magnetic ink is 200 nm to 50 μm.

The particle size range of the magnetic ink in the technical scheme is 200 nanometers to 50 micrometers, so that the application range of the magnetic ink is widened, and the use flexibility of the magnetic ink is improved.

In order to achieve the second object of the present invention, the technical solution of the present invention provides a method for manufacturing magnetic ink, which comprises mixing 30% to 55% of 3, 4-epoxycyclohexylmethyl 3, 4-epoxycyclohexyl formate, 7% to 20% of di-3, 4-epoxycyclohexylmethyl-adipate, 1% to 30% of magnetic pigment and 3% to 15% of hydrogenated bisphenol a epoxy resin according to the weight percentage, placing the mixture in a stirrer, and controlling the stirrer to rotate at a first preset speed for a first preset time to obtain a first mixture. Adding 0.5% to 4% of 4-phenylthio-phenyldiphenylsulfonium hexafluorophosphate to the first mixture, and controlling the stirrer to rotate at a second preset speed for a second preset time to obtain the magnetic ink.

The magnetic ink in the technical scheme is used for manufacturing the image-text variable anti-counterfeiting element in any one of the technical schemes.

Specifically, according to the components calculated according to the weight percentage in the technical scheme, 30% to 55% of 3, 4-epoxycyclohexylmethyl 3, 4-epoxycyclohexyl formate, 7% to 20% of di-3, 4-epoxycyclohexylmethyl-adipate, 1% to 30% of magnetic pigment and 3% to 15% of hydrogenated bisphenol A epoxy resin are mixed and then placed in a stirrer, the stirrer is started, the stirrer is controlled to rotate at a first preset speed for a first preset time period to obtain a first mixture, then the stirrer is controlled to continue to rotate at the first preset speed, 0.5% to 4% of 4-thiophenyl-phenyldiphenylsulfonium hexafluorophosphate is slowly added into the first mixture, and the stirrer is controlled to rotate at a second preset speed for a second preset time period to obtain the magnetic ink.

In the above technical solution, the components are calculated according to the weight percentage, 30% to 55% of 3, 4-epoxycyclohexylmethyl 3, 4-epoxycyclohexyl formate, 7% to 20% of di-3, 4-epoxycyclohexylmethyl-adipate, 1% to 30% of magnetic pigment and 3% to 15% of hydrogenated bisphenol a epoxy resin are mixed and then placed in a stirrer, and the stirrer is controlled to rotate at a first preset speed for a first preset time to obtain a first mixture, specifically comprising:

mixing 30 to 55 percent of 3, 4-epoxycyclohexylmethyl 3, 4-epoxycyclohexylformate, 7 to 20 percent of di-3, 4-epoxycyclohexylmethyl-adipate, 5 to 6 percent of ethoxylated trimethylolpropane triacrylate and 1.5 to 2.5 percent of 3, 3-oxybis (methylene) -bis-3-ethyl-oxetane according to the weight percentage, placing the mixture in a stirrer, and controlling the stirrer to rotate at a third preset speed for a third preset time to obtain a second mixture. And adding 1 to 30 percent of magnetic pigment and 3 to 15 percent of hydrogenated bisphenol A epoxy resin into the second mixture, and controlling the stirrer to rotate at a fourth preset speed for a fourth preset time to obtain a first mixture.

In the technical scheme, the step of obtaining the first mixture specifically comprises the steps of mixing 30 to 55 percent of 3, 4-epoxycyclohexylmethyl 3, 4-epoxycyclohexyl formate, 7 to 20 percent of di-3, 4-epoxycyclohexylmethyl-adipate, 5 to 6 percent of ethoxylated trimethylolpropane triacrylate and 1.5 to 2.5 percent of 3, 3-oxybis-methylene-bis-3-ethyl-oxetane, placing the mixture in a stirrer, starting the stirrer, controlling the stirrer to rotate at a third preset speed for a third preset time period, controlling the stirrer to continue to rotate at the third preset speed rate after obtaining the second mixture, slowly adding 1 to 30 percent of magnetic pigment and 3 to 15 percent of hydrogenated bisphenol A epoxy resin into the second mixture, controlling the stirrer to rotate at a fourth preset speed rate for a fourth preset time period, a first mixture is obtained.

In any of the above technical solutions, the magnetic pigment is a magnetic optically variable pigment and/or a magnetic photonic crystal pigment.

According to the technical scheme, the magnetic pigment can be a magnetic optically variable pigment and/or a magnetic photonic crystal pigment, so that magnetic optically variable ink and/or magnetic photonic crystal ink can be obtained, color change of the magnetic ink under the action of magnetic force is realized, and the applicability of the magnetic ink is improved.

In order to achieve the third object of the present invention, the technical solution of the present invention provides a variable image-text anti-counterfeiting element, which is manufactured by using the manufacturing method of the variable image-text anti-counterfeiting element according to any one of the above technical solutions, so that the variable image-text anti-counterfeiting element has all the beneficial effects of any one of the above technical solutions, and is not described herein again.

In order to achieve the fourth object of the present invention, the technical solution of the present invention provides a device for manufacturing a variable-image security element, comprising: the spraying device is used for spraying the magnetic ink to a printing stock; an ultraviolet curing light source for emitting ultraviolet curing light; the light guide plate is provided with changeable pictures and texts; a magnetic field generating device for generating magnetic force; the control device is used for realizing the steps of the method for manufacturing the image-text variable anti-counterfeiting element in any technical scheme, so that all the beneficial effects of any technical scheme are achieved, and the details are not repeated herein.

In order to achieve the fifth object of the present invention, the technical solution of the present invention provides a readable storage medium, on which a program is stored, and the program, when executed by a processor, implements the steps of the method for manufacturing the variable-pattern anti-counterfeit element according to any one of the above technical solutions, or implements the steps of the method for manufacturing the magnetic ink according to any one of the above technical solutions, so that all the beneficial effects of any one of the above technical solutions are achieved, and details are not repeated herein.

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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a flowchart illustrating one step of a method for manufacturing a variable-pattern security element according to some embodiments of the present invention;

fig. 2 is a second flowchart illustrating a method for manufacturing a variable-pattern security device according to some embodiments of the present invention;

fig. 3 is a third step flowchart of a method for manufacturing a variable-pattern security element according to some embodiments of the present invention;

FIG. 4 is a flowchart illustrating a fourth step of a method for fabricating a variable-pattern security device according to some embodiments of the present invention;

FIG. 5 is a flowchart illustrating steps in a method of forming magnetic ink in accordance with certain embodiments of the present invention;

FIG. 6 is a second flowchart illustrating a method of manufacturing magnetic ink according to some embodiments of the present invention;

FIG. 7 is a block diagram schematically illustrating the construction of an apparatus for producing a variable-image security element in accordance with some embodiments of the invention;

FIG. 8 is a schematic structural diagram of an apparatus for making a variable-pattern security element according to some embodiments of the present invention;

fig. 9 is a second schematic structural diagram of an apparatus for manufacturing a variable-pattern security device according to some embodiments of the present invention;

FIG. 10 is one of the substrate configurations of some embodiments of the invention;

FIG. 11 is a schematic diagram of a light guide plate according to some embodiments of the present invention;

fig. 12 is a schematic view of one of the structures of the variable-pattern security element according to some embodiments of the present invention;

fig. 13 is a second schematic structural view of a variable-pattern security device according to some embodiments of the present invention;

fig. 14 is a third schematic structural view of a variable-pattern security device according to some embodiments of the present invention;

FIG. 15 is a second schematic diagram of a light guide plate according to some embodiments of the present invention;

fig. 16 is a fourth schematic view of the variable-pattern security device according to some embodiments of the present invention;

FIG. 17 is a fifth schematic view of a variable security element according to some embodiments of the present invention;

FIG. 18 is a sixth schematic view of a variable security element according to some embodiments of the present invention;

FIG. 19 is a second schematic view of a substrate configuration according to some embodiments of the invention;

FIG. 20 is a third schematic diagram of a light guide plate according to some embodiments of the present invention;

fig. 21 is a seventh schematic view of a variable-pattern security device according to some embodiments of the present invention;

fig. 22 is an eighth schematic view of a variable security device according to some embodiments of the present invention;

fig. 23 is a ninth schematic view of a variable-pattern security device according to some embodiments of the invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 7 to 23 is:

100: variable-image security element, 210: first region, 220: second region, 230: graph and text, 300: device for manufacturing variable-image-text anti-counterfeiting element, 310: spray coating device, 320: ultraviolet curing light source, 330: substrate, 350: light guide plate, 360: magnetic field generating device, 370: and a control device.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Methods of making a variable-text security element, methods of making magnetic inks, variable-text security elements 100, devices 300 for making variable-text security elements, and readable storage media according to some embodiments of the invention are described below with reference to fig. 1-23.

Example 1:

as shown in fig. 1, the embodiment provides a method for manufacturing a variable-pattern security element, including:

step S102, controlling a spraying device to spray the magnetic ink on a printing stock;

and step S104, controlling the ultraviolet curing light to irradiate the printing stock through the pictures and texts on the light guide plate.

Wherein, the picture and text on the light guide plate can be changed at least one kind.

The variable-image-text anti-counterfeiting element in the embodiment can be anti-counterfeiting images and texts, the printing stock can be bills or securities and the like, and the variable-image-text anti-counterfeiting element is printed on the printing stock by adopting magnetic ink, so that the anti-counterfeiting effect on the bills or the securities can be achieved, and the use safety of the bills or the securities is improved.

It is understood that the magnetic ink in this embodiment can change in appearance under the magnetic force of the magnetic field and recover after the magnetic force disappears. And the magnetic ink can be cured by the ultraviolet curing light, so that the appearance state of the magnetic ink under the action of the magnetic force can be still kept after the magnetic force action is lost, and the magnetic ink is printed on a printing stock.

In some embodiments of the present embodiment, the magnetic ink can undergo different appearance changes under different magnetic forces.

In the embodiment, after the magnetic ink is sprayed on the printing stock, the ultraviolet curing light is controlled to irradiate the printing stock through the pictures and texts on the light guide plate, so that the ultraviolet curing light corresponding to the shapes of the pictures and texts on the light guide plate can be irradiated on the printing stock, and the ultraviolet curing light in the rest areas is shielded or reflected by the light guide plate and cannot be irradiated on the printing stock, so that the magnetic ink in the areas corresponding to the pictures and texts on the printing stock is cured, namely, the pictures and texts on the light guide plate are printed on the printing stock.

In some embodiments of this embodiment, the ultraviolet curing light may be irradiated on the printing material through the image and text on the light guide plate, and in other embodiments of this embodiment, the ultraviolet curing light may also be reflected on the printing material by the image and text on the light guide plate, so as to cure the magnetic ink in the corresponding area on the printing material.

Specifically, the pictures and texts on the light guide plate can be changed in at least one way in the embodiment, and then the pictures and texts on the light guide plate are controlled to be changed, so that the ultraviolet curing light can irradiate different areas of the printing stock, and further the magnetic ink in the different areas is cured, different pictures and texts are printed on the printing stock, the light guide plate does not need to be replaced, the operation is simple, the manufacturing cost of the picture and text variable anti-counterfeiting element is saved, and the manufacturing efficiency of the picture and text variable anti-counterfeiting element is improved.

It can be understood that the images and texts in the embodiment can be continuously changed, so that the manufacturing time of the image and text variable anti-counterfeiting element is further shortened, and the manufacturing efficiency of the image and text variable anti-counterfeiting element is improved.

In some embodiments of this embodiment, the graphics on the light guide plate can be fine graphics with a line width of less than 30 μm, so that fine printing of magnetic ink is realized, and the applicability of the graphics-variable anti-counterfeiting element is improved.

Example 2:

the present embodiment provides a method for manufacturing a variable-pattern security element, which includes the following technical features in addition to the technical features of embodiment 1.

The magnetic ink can change color under the action of magnetic force before being irradiated by ultraviolet curing light.

It is understood that the magnetic ink in this embodiment contains magnetic particles, and the magnetic particles can be oriented under the action of magnetic force before the magnetic ink is irradiated by the ultraviolet curing light, so as to form the color change of the magnetic ink. The magnetic particles can be oriented differently under the magnetic force action of different magnetic force values, so that the colors of the magnetic ink are different under the magnetic force action of different magnetic force values. After the magnetic ink is irradiated by ultraviolet curing light, the magnetic particles are cured and cannot be oriented under the action of magnetic force, so that the color of the magnetic ink cannot change along with the change of the magnetic force.

In some embodiments of this embodiment, the magnetic ink can change at least one color under the action of magnetic force, and when viewed from a variable angle, at least one color can have a rolling stripe effect, so as to further improve the anti-counterfeiting performance of the image-text variable anti-counterfeiting element.

The magnetic ink in the embodiment can change color under the action of magnetic force, so that the magnetic ink can present different colors through different magnetic forces, the color printing of the magnetic ink is realized, the operation is simple, and the manufacturing cost of the image-text variable anti-counterfeiting element is reduced.

Example 3:

as shown in fig. 2, the present embodiment provides a method for manufacturing a variable-pattern security element, which includes the following technical features in addition to the technical features of any of the above embodiments.

Before or simultaneously with the step of controlling the ultraviolet curing light to irradiate the printing stock through the pictures and the texts on the light guide plate, the method further comprises the step of applying magnetic force with a first magnetic force value to the printing stock.

In other words, the method for manufacturing the image-text variable anti-counterfeiting element in this embodiment specifically includes:

step S202, controlling a spraying device to spray the magnetic ink on a printing stock;

step S204, applying a magnetic force with a first magnetic force value to a printing stock;

and step S206, controlling the ultraviolet curing light to irradiate the printing stock through the pictures and texts on the light guide plate.

In this embodiment, a magnetic force with a first magnetic force value is applied to the printing material, so that the magnetic ink on the printing material can change in color corresponding to the first magnetic force value under the magnetic force action of the first magnetic force value. The ultraviolet curing light is controlled to irradiate the printing stock through the pictures and texts on the light guide plate, so that the magnetic ink corresponding to the pictures and texts on the printing stock is cured into the color corresponding to the first magnetic force value, the operation is simple, and the color printing of the picture and text variable anti-counterfeiting element is realized.

Example 4:

as shown in fig. 3, the present embodiment provides a method for manufacturing a variable-pattern security element, which includes the following technical features in addition to the technical features of any of the above embodiments.

The printing stock includes the first region corresponding with picture and text, and control ultraviolet curing light shines the printing stock through the picture and text on the light guide plate, specifically includes that control ultraviolet curing light shines the first region of printing stock through the picture and text on the light guide plate. In other words, the method for manufacturing the image-text variable anti-counterfeiting element in this embodiment specifically includes:

step S302, controlling a spraying device to spray the magnetic ink on a printing stock;

step S304, applying a magnetic force with a first magnetic force value to the printing stock;

and S306, controlling the ultraviolet curing light to irradiate the first area of the printing stock through the pictures and texts on the light guide plate.

In this embodiment, the printing material includes a first area, and it can be understood that the first area of the printing material corresponds to the image-text area of the light guide plate. The ultraviolet curing light irradiates the first area of the printing stock through the pictures and texts on the light guide plate, namely, the areas of the printing stock corresponding to the pictures and texts of the light guide plate are cured, so that the ultraviolet curing light can cure different areas of the printing stock in a targeted manner, and the applicability of the manufacturing method of the picture and text variable anti-counterfeiting element is improved.

Example 5:

the embodiment provides a method for manufacturing a variable-image-text anti-counterfeiting element, and in addition to the technical features of any one of the above embodiments, the embodiment further includes the following technical features.

A first magnetic force value is determined based on the color of the magnetic ink of the first region.

In this embodiment, the magnetic ink can change in different colors under the effect of different magnetic force values. And then, determining a first magnetic force value according to the color of the magnetic ink in the first area, so that the magnetic ink in the first area can be cured to a preset color, and the flexibility of the manufacturing method of the image-text variable anti-counterfeiting element is improved.

Example 6:

as shown in fig. 4, the present embodiment provides a method for manufacturing a variable-pattern security element, which includes the following technical features in addition to the technical features of any of the above embodiments.

The printing stock also comprises a second area, and after the step of controlling the ultraviolet curing light to irradiate the printing stock through the pictures and texts on the light guide plate, the printing stock also comprises a magnetic force with a second magnetic force value applied to the printing stock; and controlling the ultraviolet curing light to irradiate the second area of the printing stock. Wherein the second region is a sprayed region of magnetic ink.

step S402, controlling a spraying device to spray the magnetic ink on a printing stock;

step S404, controlling ultraviolet curing light to irradiate a printing stock through the pictures and texts on the light guide plate;

step S406, applying a magnetic force with a second magnetic force value to the printing stock;

and step S408, controlling the ultraviolet curing light to irradiate the second area of the printing stock.

In this embodiment, after the ultraviolet curing light is controlled to irradiate the area corresponding to the image-text of the light guide plate on the printing material, that is, after the magnetic ink in the first area is cured, a magnetic force with a second magnetic force value is applied to the printing material, so that the magnetic ink which is not cured on the printing material can be subjected to color change. It is understood that the second magnetic force value cannot cause the color change of the magnetic ink of the first region because the magnetic ink of the first region is already cured by the ultraviolet curing light.

Specifically, in this embodiment, the first magnetic force value is different from the second magnetic force value, so that the colors of the inks in different areas on the printing material are different, and the anti-counterfeiting reliability of the variable image-text anti-counterfeiting element is further improved.

Specifically, in this embodiment, the second area is a sprayed area of the magnetic ink, so as to cure all the sprayed magnetic ink. It will be appreciated that the second region and the first region may overlap one another.

In the embodiment, the magnetic force with the second magnetic force value is applied to the printing stock, so that the magnetic ink in different areas on the printing stock can be in different colors, and the reliability of the image-text variable anti-counterfeiting element is improved.

Example 7:

A second magnetic force value is determined based on the color of the magnetic ink of the second region.

In this embodiment, the second magnetic force value is determined according to the color of the magnetic ink in the second area, so that the magnetic ink in the second area can change in a preset color under the action of the second magnetic force value, and the applicability of the manufacturing method of the image-text variable anti-counterfeiting element is improved.

Example 8:

Controlling the liquid crystal molecules to rearrange to change the pictures and texts on the light guide plate; and/or controlling the angle change of at least one reflector to change the pictures and texts on the light guide plate; and/or controlling the digital printing device to change the pictures and texts on the light guide plate so as to obtain the pictures and texts which can be changed in at least one way.

In some embodiments of this embodiment, the light guide plate may be a liquid crystal mask, and then by controlling the liquid crystal molecule rearrangement mode, the liquid crystal molecules of the light guide plate can reflect the ultraviolet curing light with different patterns and texts, so as to change the patterns and texts on the light guide plate, improve the conversion efficiency of the patterns and texts on the light guide plate, realize the continuous change of the patterns and texts on the light guide plate, and further shorten the manufacturing time of the pattern and text variable anti-counterfeiting element.

In some embodiments of the present embodiment, the light guide plate may be a digital microlens device. The ultraviolet curing light with different image-text shapes is reflected to the printing stock through different angles of at least one reflector on the light guide plate, so that the light guide plate can realize the printing of various image-texts, and the manufacturing cost of the image-text variable anti-counterfeiting element is reduced.

In other embodiments of this embodiment, the light guide plate may be a digital printing mask, and the image and text on the light guide plate are changed by digital printing, so that the operation is simple, the manufacturing cost of the image and text variable anti-counterfeiting element is reduced, and the manufacturing efficiency of the image and text variable anti-counterfeiting element is improved.

Example 9:

The magnetic ink is magnetic optically variable ink and/or magnetic photonic crystal ink.

The magnetic ink in the embodiment can be magnetic optically variable ink and/or magnetic photonic crystal ink, so that the magnetic ink can change color under the action of magnetic force, and the use flexibility of the image-text variable anti-counterfeiting element is improved.

Example 10:

The particle size of the magnetic ink ranges from 200 nanometers to 50 micrometers.

In the embodiment, the particle size range of the magnetic ink is 200 nanometers to 50 micrometers, so that the application range of the magnetic ink is widened, and the application flexibility of the magnetic ink is improved.

Example 11:

as shown in fig. 5, the present embodiment provides a method for manufacturing magnetic ink, including:

step S502, calculating the components according to the weight percentage, mixing 30 to 55 percent of 3, 4-epoxy cyclohexyl methyl 3, 4-epoxy cyclohexyl formate, 7 to 20 percent of di-3, 4-epoxy cyclohexyl methyl-adipate, 1 to 30 percent of magnetic pigment and 3 to 15 percent of hydrogenated bisphenol A epoxy resin, then placing the mixture into a stirrer, and controlling the stirrer to rotate at a first preset speed for a first preset time to obtain a first mixture;

and step S504, adding 0.5 to 4 percent of 4-thiophenyl-phenyl diphenyl sulfonium hexafluorophosphate into the first mixture, and controlling the stirrer to rotate at a second preset speed for a second preset time to obtain the magnetic ink.

It is understood that the magnetic ink in this embodiment is used to fabricate the variable-text security element in any of the above embodiments.

Specifically, according to the components by weight percentage, 30% to 55% of 3, 4-epoxycyclohexylmethyl 3, 4-epoxycyclohexyl formate, 7% to 20% of di-3, 4-epoxycyclohexylmethyl-adipate, 1% to 30% of magnetic pigment and 3% to 15% of hydrogenated bisphenol A epoxy resin are mixed and then placed in a stirrer, the stirrer is started, the stirrer is controlled to rotate at a first preset speed for a first preset time period, after the first mixture is obtained, the stirrer is controlled to continue to rotate at the first preset speed, 0.5% to 4% of 4-phenylthio-phenyldiphenylsulfonium hexafluorophosphate is slowly added into the stirrer, and the stirrer is controlled to rotate at a second preset speed for a second preset time period, so that the magnetic ink is obtained.

In some embodiments of the present embodiment, the first preset rate and the second preset rate may be 150 rpm to 300 rpm, and the first preset period and the second preset period may be 10 minutes to 20 minutes.

In some other embodiments of this embodiment, the first preset rate and the second preset rate may be the same or different. The first preset time period and the second preset time period may be the same or different.

In some embodiments of this example, the weight percent of 3, 4-epoxycyclohexylmethyl 3, 4-epoxycyclohexyl formate may be 35%, 40% or 50%. The weight percentage of di-3, 4-epoxycyclohexylmethyl-adipate can be 10%, 15% or 18%. The magnetic pigment may be present in an amount of 5%, 15% or 20% by weight. The hydrogenated bisphenol a epoxy resin may be present in an amount of 4%, 6% or 10% by weight. The weight percentage of 4-phenylthio-phenyldiphenylsulfonium hexafluorophosphate salt may be 1%, 2% or 3%.

Example 12:

as shown in fig. 6, the present embodiment provides a method for manufacturing magnetic ink, and in addition to the technical features of any of the above embodiments, the present embodiment further includes the following technical features.

The method comprises the following steps of mixing 30 to 55 weight percent of 3, 4-epoxycyclohexylmethyl 3, 4-epoxycyclohexyl formate, 7 to 20 weight percent of di-3, 4-epoxycyclohexylmethyl-adipate, 1 to 30 weight percent of magnetic pigment and 3 to 15 weight percent of hydrogenated bisphenol A epoxy resin, placing the mixture into a stirrer, and controlling the stirrer to rotate at a first preset speed for a first preset time to obtain a first mixture, wherein the first mixture specifically comprises the following components in percentage by weight:

In other words, the method for preparing the magnetic ink in this embodiment specifically includes:

step S602, mixing 30 to 55 weight percent of 3, 4-epoxycyclohexylmethyl 3, 4-epoxycyclohexyl formate, 7 to 20 weight percent of di-3, 4-epoxycyclohexylmethyl-adipate, 5 to 6 weight percent of ethoxylated trimethylolpropane triacrylate and 1.5 to 2.5 weight percent of 3, 3-oxybis (methylene) -bis-3-ethyl-oxetane, placing the mixture in a stirrer, and controlling the stirrer to rotate at a third preset speed for a third preset time to obtain a second mixture;

step S604, adding 1 to 30 percent of magnetic pigment and 3 to 15 percent of hydrogenated bisphenol A epoxy resin into the second mixture, and controlling a stirrer to rotate at a fourth preset speed for a fourth preset time to obtain a first mixture;

and step S606, adding 0.5 to 4 percent of 4-thiophenyl-phenyl diphenyl sulfonium hexafluorophosphate into the first mixture, and controlling the stirrer to rotate at a second preset speed for a second preset time to obtain the magnetic ink.

In this embodiment, the step of obtaining the first mixture specifically includes mixing 30% to 55% of 3, 4-epoxycyclohexylmethyl 3, 4-epoxycyclohexyl formate, 7% to 20% of di-3, 4-epoxycyclohexylmethyl-adipate, 5% to 6% of ethoxylated trimethylolpropane triacrylate and 1.5% to 2.5% of 3, 3-oxybis-methylene-bis-3-ethyl-oxetane, placing the mixture in a stirrer, turning on the stirrer, controlling the stirrer to rotate at a third preset rate for a third preset time period, after obtaining the second mixture, controlling the stirrer to continue to rotate at the third preset rate, slowly adding 1% to 30% of a magnetic pigment and 3% to 15% of hydrogenated bisphenol a epoxy resin to the second mixture, controlling the stirrer to rotate at a fourth preset rate for a fourth preset time period, a first mixture is obtained.

In some embodiments of the present embodiment, the third and fourth preset rates may be 150 rpm to 300 rpm, and the third and fourth preset periods may be 10 minutes to 20 minutes.

In other embodiments of this embodiment, the third preset rate and the fourth preset rate may be the same or different. The third preset time period and the fourth preset time period may be the same or different.

In some embodiments of this example, the weight percent of ethoxylated trimethylolpropane triacrylate may be 5.2%, 5.5%, or 5.8%, and the weight percent of 3, 3-oxybis (methylene) -bis-3-ethyl-oxetane may be 1.7%, 2.0%, or 2.3%.

Example 13:

the present embodiment provides a method for manufacturing magnetic ink, which includes the following technical features in addition to the technical features of any of the above embodiments.

The magnetic pigment is magnetic optically variable pigment and/or magnetic photonic crystal pigment.

In the embodiment, the magnetic pigment can be a magnetic optically variable pigment and/or a magnetic photonic crystal pigment, so that magnetic optically variable ink and/or magnetic photonic crystal ink can be obtained, color change of the magnetic ink under the action of magnetic force is realized, and the applicability of the magnetic ink is improved.

Example 14:

as shown in fig. 13 and fig. 14, the image-text variable security element 100 is provided in this embodiment, and is manufactured by using the method for manufacturing the image-text variable security element according to any one of the above embodiments, so that all the beneficial effects of any one of the above embodiments are achieved, and the details are not repeated herein.

Example 15:

as shown in fig. 7, the embodiment provides an apparatus 300 for manufacturing a variable-pattern security element, which includes a spraying device 310, an ultraviolet curing light source 320, a substrate 330, a light guide plate 350, a magnetic field generating device 360, and a control device 370. The spray device 310 is used to spray magnetic ink onto the substrate 330. The ultraviolet curing light source 320 is for emitting ultraviolet curing light. The light guide plate 350 is provided with variable patterns. The magnetic field generating means 360 is for generating magnetic force. The control device 370 is used to implement the steps of the method for manufacturing the variable-image security element according to any of the above embodiments.

As shown in fig. 8 and 9, in some embodiments of the present embodiment, the substrate 330 may be a sheet of paper. The spray device 310 is used to spray magnetic ink onto the substrate 330. The ultraviolet curing light source 320 is used for curing the magnetic ink on the printing material 330, and it is understood that the ultraviolet curing light source 320 may be a point light source or a surface light source.

In some embodiments of the present embodiment, the light guide plate 350 may be disposed between the substrate 330 and the uv curing light source 320 to realize that the uv curing light irradiates the substrate 330 through the graphics 230 on the light guide plate 350. In other embodiments of this embodiment, the light guide plate 350 may also be disposed on the side of the substrate 330 to realize that the uv-curing light is reflected on the substrate 330 through the light guide plate 350.

The device 300 for manufacturing the variable-image security element in this embodiment further includes a magnetic field generating device 360, and the magnetic field generating device 360 is configured to generate magnetic fields with different strengths so as to apply magnetic forces with different magnetic force values to the substrate 330.

The device 300 for manufacturing a variable-text anti-counterfeiting element in this embodiment further includes a control device 370, and it can be understood that the control device 370 is electrically connected to the spraying device 310, the ultraviolet curing light source 320, the light guide plate 350 and the magnetic field generating device 360 to implement the steps of the method for manufacturing a variable-text anti-counterfeiting element in any embodiment, so that all the beneficial effects of any embodiment are achieved, and no further description is provided herein.

Example 16:

the present embodiment provides a readable storage medium, where a program is stored on the readable storage medium, and when the program is executed by a processor, the steps of the method for manufacturing the variable-pattern anti-counterfeiting element according to any one of the above embodiments or the steps of the method for manufacturing the magnetic ink according to any one of the above embodiments are implemented, so that all beneficial effects of any one of the above embodiments are achieved, and details are not described herein again.

Example 17:

in the related art, some researchers and companies use photonic crystals as ink for color writing and printing, wherein one of the photonic crystal color inks, including photonic crystal particles and a solvent, can be screen printed and inkjet printed.

A magnetic photonic crystal was specially processed by nanobuk corporation in korea to obtain a photonic crystal pigment, and the photonic crystal pigment was directly added as a pigment to a screen printing ink to perform screen printing. However, the particle size of the pigment is between several microns and dozens of microns due to the existence of microcapsules in the photonic crystal, and only screen printing can be performed, so that the application of the photonic crystal pigment to ink-jet printing ink is limited, and variable pictures and texts obtained by printing the photonic crystal pigment are further limited.

For magnetic pigments, whether photonic crystal pigments or magnetic optically variable pigment inks, at present, only a screen printing mode can be adopted, and screen printing is required to manufacture a screen printing plate and cannot be changed at any time. It is necessary to find a way to print fine variable graphics using magnetic ink in high speed continuous printing.

The magnetic photonic crystal pigment cannot be made into digital printing ink due to the limitation of the particle size of the magnetic photonic crystal pigment. In order to solve the above problems in the related art, this embodiment provides a method for manufacturing an image-text variable anti-counterfeit element, in which variable images and texts are printed on a continuous printing material through variable images and texts on a light guide plate, so that the magnetic ink can indirectly achieve a digital printing effect, thereby forming an anti-counterfeit mark with a variable effect, improving the printing effect, and widening the application thereof.

Specifically, there are three ways for changing the graphics and text of the light guide plate in this embodiment, one of which is to digitally print a mask, that is, to change the graphics and text on the light guide plate by digital printing. One is to use a thin film transistor liquid crystal display as a mask, i.e., to realize the change of the image and text on the light guide plate by controlling the rearrangement of the liquid crystal molecules. The other is that the image and text of the light guide plate can be changed by digital light processing, namely the light guide plate can be a digital micro-lens device, and the image and text on the light guide plate can be changed by controlling the angle change of at least one reflector. In the embodiment, the variable information printing of the magnetic ink is realized through the image-text of the light guide plate which can be changed at any time, the bottleneck that the magnetic ink can only use a silk screen plate to print a single pattern is broken through, and the application of the magnetic ink is richer and the application is wider.

As shown in fig. 8 and 10, the method for manufacturing the image-text variable security element in the present embodiment includes printing magnetic ink on the substrate 330, transporting the substrate 330 coated with the magnetic ink to the first curing region, irradiating the substrate 330 with the ultraviolet curing light source 320 through the variable image-text 230 of the light guide plate 350, curing the exposed first region 210 of the substrate 330, and leaving the unexposed second region 220 shielded by the light guide plate 350 uncured. As shown in fig. 9, the substrate 330 is transported to the second curing area, the ultraviolet curing light is directly irradiated on the substrate 330, and the second area 220 is also cured, i.e. the curing of the magnetic ink on the whole substrate 330 is realized.

In the first curing area and the second curing area, the magnetic fields of the substrate 330 are different, different magnetic values are applied to the substrate 330 by different magnetic fields, and then the magnetic particles in the magnetic ink can be oriented differently under the action of different magnetic values, so that different appearance effects are generated, and the first area 210 and the second area 220 are distinguished. The embodiment realizes the printing of different pictures and texts on different printing materials 330 through the variable pictures and texts 230 on the light guide plate 350.

It can be understood that the magnetic ink in this embodiment contains a photosensitive material, so that the magnetic ink can be cured under the irradiation of the ultraviolet curing light, that is, the magnetic particles in the magnetic ink can be cured, so that the magnetic particles retain the magnetic field information, and further the magnetic ink can retain the color generated by the magnetic field.

In some embodiments of the present embodiment, the magnetic ink may be an ink containing magnetic photonic crystal particles.

Specifically, this embodiment provides a method for manufacturing an image-text variable anti-counterfeiting element, taking paper as an example of a printing object 330, as shown in fig. 12, printing magnetic ink on the surface of the paper in a screen printing manner, controlling ultraviolet curing light to irradiate the printing object 330 through the image text 230 of the light guide plate 350 as shown in fig. 11, applying a first magnetic field to the printing object 330, transmitting magnetic force to the magnetic ink through the printing object 330, and performing a first-stage curing, as shown in fig. 13, that an area "@" corresponding to the image text 230 is cured.

And applying a second magnetic field to the paper, controlling ultraviolet curing light to directly irradiate the paper, and performing second-stage curing. The magnetic ink contains magnetic particles, and the magnetic particles can be oriented under the action of the first magnetic force or the second magnetic force. The magnetic ink can be cured under the irradiation of ultraviolet curing light. The magnetic ink is capable of undergoing a change in appearance under the influence of a magnetic field before being uncured. Further, as shown in fig. 14, the magnetic ink on the substrate 330 can be cured such that the number "100" is cured.

It should be noted that, as shown in fig. 13 and 14, the size of the rmb mark "is more fine, and a line width which is difficult to be distinguished by naked eyes is achieved, and is not limited to the size of the schematic diagram.

As shown in fig. 13 and 14, the magnetic ink has a flip-flop effect, and the rmb mark "@" of the first region 210 appears in at least two colors after the first stage curing, and a rolling bar effect appears when viewed from varying angles. The second area 220 also appears two colors in number "100" when cured in the second stage. The areas of the two colors of "" and "100" are staggered. Both "and" 100 "will change color when the viewing angle changes. And the changed colors of '100' are at least partially staggered when the observation angle is changed.

As shown in fig. 7, the embodiment further provides an apparatus 300 for manufacturing a variable-pattern security element, which includes a paper feeding device, a paper collecting device, a printing device, an ink supplying device, magnetic ink, a printing material 330, a light guide plate 350, a magnetic field generating device 360, and an ultraviolet curing light source 320.

Wherein the magnetic ink is printed on the substrate 330, and before being uncured, the magnetic ink can undergo an appearance change, such as a color change, under magnetic force, and the effect disappears after the magnetic force is removed. It is understood that the graphics on the light guide plate 350 in this embodiment are continuously variable.

The curing system in this embodiment has at least two parts, and the first curing region is provided with a magnetic field generating device 360, a light guide plate 350 and an ultraviolet curing light source 320; the second curing zone is provided with a magnetic field generating device 360 and an ultraviolet curing light source 320.

In some embodiments of the present embodiment, the particles in the magnetic ink have a particle size in the range of 50 micrometers to 200 nanometers.

In some embodiments of the present embodiment, the magnetic ink is a uv curable ink.

In some embodiments of the present embodiment, the paper feeding device and the paper delivery device are capable of delivering and delivering rolled paper or sheets.

Example 18:

the embodiment provides a method for manufacturing an image-text variable anti-counterfeiting element, as shown in fig. 19, taking paper as an example of a printing material 330, as shown in fig. 16, printing magnetic ink on the surface of the paper in a screen printing manner, controlling ultraviolet curing light to irradiate the printing material 330 through the image text 230 on a light guide plate 350 as shown in fig. 15, applying a first magnetic field to the printing material 330, transmitting magnetic force to the magnetic ink through the printing material 330, and performing first-stage curing, as shown in fig. 17, wherein a combination of numbers and letters "L139F 26054A" corresponding to the image text 230 is cured.

It should be noted that the size of the graphics on the light guide plate 150 in fig. 15 can be finer to achieve a line width that is difficult to be distinguished by naked eyes, and is not limited to the size of the schematic diagram.

And applying a second magnetic field to the paper, controlling ultraviolet curing light to directly irradiate the paper, and performing second-stage curing. The magnetic ink contains magnetic particles, and the magnetic particles can be oriented under the action of the first magnetic force or the second magnetic force. The magnetic ink can be cured under the irradiation of ultraviolet curing light. The magnetic ink is capable of undergoing a change in appearance under the influence of a magnetic field before being uncured. Further, as shown in fig. 18, the magnetic ink on the substrate 330 can be cured such that the number "200" is cured.

As shown in fig. 17 and 18, the magnetic ink has a flip-flop effect, and after the first stage of curing, the combination of letters and numbers "L139F 26054A" takes on at least two colors, and when viewed from different angles, a rolling bar effect appears. The number "200" also appears in two colors when cured in the second stage. The two-color regions of "L139F 26054A" and "200" are staggered. When the observation angle is changed, the colors of the L139F26054A and the L200F are changed. And the changed colors of the L139F26054A and the L200 are at least partially staggered when the observation angle is changed.

In some embodiments of the present embodiment, different patterns 230 on the light guide plate 150 may be arranged according to different substrates 330.

Example 19:

in the embodiment, paper is taken as an example of the printing material 330, as shown in fig. 21, magnetic ink is printed on the surface of the paper in a screen printing manner, ultraviolet curing light is controlled to irradiate the printing material 330 through the pattern 230 on the light guide plate 350 as shown in fig. 20, a first magnetic field is applied to the printing material 330, magnetic force is transmitted to the magnetic ink through the printing material 330, and first-stage curing is performed, as shown in fig. 22, a combined pattern of stars and circles is cured.

It should be noted that the size of the graphics 230 on the light guide plate 150 in fig. 20 can be finer to achieve a line width that is difficult to be distinguished by naked eyes, and is not limited to the size of the schematic diagram.

And applying a second magnetic field to the paper, controlling ultraviolet curing light to directly irradiate the paper, and performing second-stage curing. The magnetic ink contains magnetic particles, and the magnetic particles can be oriented under the action of the first magnetic force or the second magnetic force. The magnetic ink can be cured under the irradiation of ultraviolet curing light, and before the magnetic ink is uncured, the appearance of the magnetic ink can be changed under the action of a magnetic field. Further, as shown in fig. 23, the magnetic ink on the substrate 330 can be cured such that the digital flower pattern is cured.

As shown in fig. 22 and 23, the magnetic ink has a flip-flop effect, and after the first stage of curing, the pattern combination of the stars and the circles presents at least two colors, and when the angle is changed, a rolling bar effect appears. When the second stage is solidified, the flower pattern also presents two colors. The two color regions of the first stage cured pattern and the second stage cured pattern are interlaced. The first stage cured pattern and the second stage cured pattern both change color as the viewing angle changes. And when the observation angle is changed, the changed colors of the first-stage cured pattern and the second-stage cured pattern are at least partially staggered.

In some embodiments of the present embodiment, different patterns 230 on the light guide plate 150 may be arranged according to different substrates 330. In summary, the embodiment of the invention has the following beneficial effects:

1. the printing of the magnetic ink is carried out through the light guide plate, so that the magnetic ink can print finer pictures and texts, and the applicability of the picture and text variable anti-counterfeiting element is improved.

2. Different pictures and texts are printed on the printing stock through the light guide plate with changeable pictures and texts, the light guide plate does not need to be replaced, the operation is simple, the realization is easy, the manufacturing cost of the picture and text variable anti-counterfeiting element is reduced, and the manufacturing efficiency of the picture and text variable anti-counterfeiting element is improved.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," 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 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.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for manufacturing an image-text variable anti-counterfeiting element is characterized by comprising the following steps:

controlling a spraying device to spray the magnetic ink on a printing stock;

controlling ultraviolet curing light to irradiate the printing stock through the pictures and texts on the light guide plate;

wherein, the pictures and texts on the light guide plate can be changed in at least one way.

2. The method of claim 1, wherein the magnetic ink is capable of changing color under the action of magnetic force before being irradiated by the UV-curable light.

3. The method of claim 1, wherein before or simultaneously with the step of controlling the uv-curing light to irradiate the substrate through the image and text on the light guide plate, the method further comprises:

applying a magnetic force to the substrate having a magnetic force value of a first magnetic force value.

4. The method for manufacturing an image-text variable security element according to claim 3, wherein the substrate includes a first area corresponding to the image-text, and the controlling the ultraviolet curing light to irradiate the substrate through the image-text on the light guide plate specifically includes:

and controlling the ultraviolet curing light to irradiate the first area of the printing stock through the pictures and texts on the light guide plate.

5. A method of making a variable-image security element as claimed in claim 4 in which the first magnetic force value is determined in dependence on the colour of the magnetic ink in the first region.

6. The method for producing a variable-image security element according to claim 1,

the printing stock further comprises a second area, and after the step of controlling the ultraviolet curing light to irradiate the printing stock through the pictures and texts on the light guide plate, the printing stock further comprises the following steps:

applying a magnetic force with a second magnetic force value to the printing stock;

controlling the ultraviolet curing light to irradiate the second area of the printing stock;

wherein the second region is a sprayed region of the magnetic ink.

7. A method of making a variable-image security element as claimed in claim 6 in which the second magnetic force value is determined in dependence on the colour of the magnetic ink in the second region.

8. The method for producing a variable-image security element according to claim 1,

controlling liquid crystal molecules to rearrange to change the pictures and texts on the light guide plate; and/or

Controlling the angle change of at least one reflector to change the pictures and texts on the light guide plate; and/or

And controlling a digital printing device to change the pictures and texts on the light guide plate so as to obtain the pictures and texts which can be changed by at least one type.

9. The method for making a variable-image security element according to any one of claims 1 to 8, wherein the magnetic ink is a magnetic optically variable ink and/or a magnetic photonic crystal ink.

10. The method of making a graphic variable security element according to any of claims 1 to 8 wherein the magnetic ink has a particle size in the range of 200 nm to 50 μm.

11. A method of making magnetic ink, comprising:

mixing 30 to 55 weight percent of 3, 4-epoxycyclohexylmethyl 3, 4-epoxycyclohexyl formate, 7 to 20 weight percent of di-3, 4-epoxycyclohexylmethyl-adipate, 1 to 30 weight percent of magnetic pigment and 3 to 15 weight percent of hydrogenated bisphenol A epoxy resin, placing the mixture into a stirrer, and controlling the stirrer to rotate at a first preset speed for a first preset time to obtain a first mixture;

and adding 0.5-4% of 4-thiophenyl-phenyl diphenyl sulfonium hexafluorophosphate into the first mixture, and controlling the stirrer to rotate at a second preset speed for a second preset time to obtain the magnetic ink.

12. The method of claim 11, wherein the steps of mixing 30% to 55% of the 3, 4-epoxycyclohexylmethyl 3, 4-epoxycyclohexyl formate, 7% to 20% of the bis-3, 4-epoxycyclohexylmethyl-adipate, 1% to 30% of the magnetic pigment, and 3% to 15% of the hydrogenated bisphenol a epoxy resin are performed in the mixer, and the mixer is controlled to rotate at the first preset speed for the first preset time to obtain the first mixture, specifically comprising:

mixing 30 to 55 percent of the 3, 4-epoxycyclohexylmethyl 3, 4-epoxycyclohexylformate, 7 to 20 percent of the di-3, 4-epoxycyclohexylmethyl-adipate, 5 to 6 percent of the ethoxylated trimethylolpropane triacrylate and 1.5 to 2.5 percent of the 3, 3-oxybis (methylene) -bis-3-ethyl-oxetane in terms of weight percent, placing the mixture in the stirrer, and controlling the stirrer to rotate at a third preset speed for a third preset time to obtain a second mixture;

and adding 1 to 30 percent of the magnetic pigment and 3 to 15 percent of the hydrogenated bisphenol A epoxy resin into the second mixture, and controlling the stirrer to rotate at a fourth preset speed for a fourth preset time to obtain the first mixture.

13. The method for making magnetic ink according to claim 11, wherein the magnetic pigment is a magnetic optically variable pigment and/or a magnetic photonic crystal pigment.

14. A variable-image security element produced by a method of producing a variable-image security element according to any one of claims 1 to 10.

15. A device for manufacturing a variable-image-text anti-counterfeiting element is characterized by comprising:

a spray device for spraying magnetic ink to a substrate;

an ultraviolet curing light source for emitting ultraviolet curing light;

the light guide plate is provided with changeable pictures and texts;

a magnetic field generating device for generating a magnetic force;

control device for carrying out the steps of the method for producing a variable-text security element according to any one of claims 1 to 10.

16. A readable storage medium, on which a program is stored, which program, when being executed by a processor, carries out the steps of the method for producing a teletext variable security element according to any one of claims 1 to 10 or the steps of the method for producing a magnetic ink according to any one of claims 11 to 13.