Crystal glittering powder card with dynamic three-dimensional colorful effect and preparation process thereof

Abstract

The invention discloses a crystal glittering powder card with a dynamic three-dimensional colorful effect and a preparation process thereof, and relates to the technical field of cards. Preparing a glitter powder printing material: mixing colorful glitter powder with a special adhesive, wherein the special adhesive is an environment-friendly silk-screen printing adhesive with high light transmittance and high refractive index; silk-screen printing of a glitter powder layer: printing the glitter powder printing material on the surface of the card by using a silk screen with the mesh number of 35-50 to form a glitter powder bottom layer, and pre-drying the glitter powder bottom layer; digital synergy treatment: applying a UV embossment layer with a three-dimensional microstructure on the pre-dried flash powder base layer through a digital synergy process; and post-processing and curing. The invention provides a crystal glittering powder card. The card can present a three-dimensional colorful effect which dynamically changes along with a visual angle and has a depth sense. The invention further provides a preparation process of the crystal shimmering powder card, and the visual effect is reliably and efficiently achieved through collaborative innovation of materials, equipment and process parameters.

Description

Technical Field

[0001] This invention relates to the field of card technology, specifically to a crystal glitter card with dynamic three-dimensional dazzling effect and its manufacturing process. Background Technology

[0002] The current visual enhancement of card products (such as collectible cards, game cards, and gift cards) is often limited by the "flat and rigid" and "static and monotonous" nature of traditional varnishing techniques. Ordinary varnishes or simple powder sprinkling processes can only provide basic gloss and cannot achieve multi-layered, dynamically changing, and dazzling effects. Existing technologies have the following shortcomings: Visual uniformity: Traditional processes produce static visual effects, lacking a dynamic and three-dimensional feel that changes with the viewing angle; Insufficient performance: Ordinary adhesives have low light transmittance and refractive index, which cannot effectively transfer and enhance the optical effects of glitter, and are prone to problems such as glitter settling, clogging, and uneven surfaces; Weak sense of layering: There is a lack of effective means to combine the gloss of the bottom layer of glitter with the optical control of the upper layer structure, making it difficult to achieve a visual gain effect of "1+1>2". Therefore, there is an urgent need for an innovative technical solution to solve the above problems and create card products with strong visual impact and high added value. Summary of the Invention

[0003] The primary objective of this invention is to overcome the shortcomings of the prior art and provide a crystal glitter card that can present a three-dimensional, dazzling effect with depth that dynamically changes with the viewing angle.

[0004] Another objective of this invention is to provide a manufacturing process for the aforementioned crystal glitter cards, which reliably and efficiently achieves the visual effect through synergistic innovation in materials, equipment, and process parameters.

[0005] To solve the above problems, the technical solution provided by the present invention is as follows:

[0006] A crystal glitter card with dynamic three-dimensional iridescent effect and its manufacturing process, comprising the following steps:

[0007] Document preparation and basic printing;

[0008] Glitter printing material preparation: Mix iridescent glitter with a special adhesive, wherein the special adhesive is an environmentally friendly screen printing adhesive with high light transmittance and high refractive index;

[0009] Screen printing glitter layer: The glitter material is printed onto the card surface using a screen with a mesh size of 35-50 to form a glitter base layer, and then pre-dried.

[0010] Digital enhancement process: A UV embossed layer with a three-dimensional microstructure is applied to the pre-dried glitter base layer using a digital enhancement process;

[0011] Post-treatment and curing.

[0012] By connecting four key steps in a specific sequence, this system systematically solves the problems of visual monotony and weak layering mentioned in the background technology. First, basic printing ensures the card's essential information; second, screen printing a glitter layer lays the physical foundation for the dazzling effect; finally, digital enhancement processing optically amplifies and modulates the underlying effect, ultimately achieving a visual sublimation from a static two-dimensional plane to a dynamic three-dimensional form. This ensures that the effects produced by each step are cumulative and synergistic, rather than independent or interfering with each other.

[0013] Optionally, the iridescent glitter has a smaller particle size than conventional packaging decoration glitter.

[0014] While using conventional large-particle glitter provides strong shimmer, it can result in a rough card surface and distorted patterns. By optimizing and using smaller particle sizes, the fineness and texture of the printed card image can be greatly improved without significantly sacrificing shimmer intensity, giving the final product both artistic appeal and a technological feel.

[0015] Optionally, the special adhesive is characterized by comprising the following components by weight percentage: 40-55% aromatic modified acrylate resin, 15-25% solvent-based polyurethane resin, 4-8% high refractive index antireflective agent, 15-25% mixed solvent, 1-3% thixotropic agent, 0.5-1.5% antisettling agent, 0.1-0.5% defoamer, 0.1-0.5% leveling agent, and 0.1-0.3% antiyellowing agent.

[0016] This elevates the adhesive from a simple "binder" to a crucial "optical medium" and "process stabilizer." Through the synergistic effect of its components, it simultaneously addresses multiple technical challenges, including high light transmittance, high refractive index, glitter suspension stability, printability, leveling properties, and durability, ensuring that the optical potential of the glitter is fully realized and stably maintained.

[0017] Optionally, the mesh count of the wire mesh is 40 mesh.

[0018] Too low a mesh count (e.g., 30 mesh) will cause glitter accumulation and sagging; too high a mesh count (e.g., above 60 mesh) will cause screen clogging and insufficient powder output. Limiting the mesh count to the optimal value of 40 mesh allows for precise control of the amount of adhesive and glitter transferred onto the substrate, forming a film layer with optimal thickness and uniform distribution. This thickness is the physical basis for inducing subsequent optical effects.

[0019] Optionally, the glitter and adhesive are mixed in a weight ratio of 1:1.

[0020] A 1:1 ratio ensures that the adhesive has sufficient quantity to completely coat and fix each glitter particle, forming a continuous, highly transparent optical medium, while the density of the glitter is sufficient to produce a strong and concentrated shimmering effect. Deviating from this ratio may result in too much adhesive and too little powder (weak effect) or too much powder and too little adhesive (poor adhesion, easy to fall off).

[0021] Optionally, the glitter printing material preparation step is characterized by low-speed mechanical stirring during mixing, followed by standing and maturing for 15-30 minutes after mixing.

[0022] Low-speed stirring avoids the large amount of air being drawn into the colloid due to violent shearing; static curing allows the adhesive molecular chains to relax, internal stress to be released, and the entrained microbubbles to have enough time to rise and burst. At the same time, it allows the glitter particles to reach a more stable suspension state in the adhesive, thereby directly improving the quality and consistency of subsequent printing.

[0023] Optionally, the UV embossed layer formed in the digital enhancement process is characterized by having a microfaceted or microlens-shaped structure.

[0024] The microscopic facets or microlens-like structures act like countless tiny prisms or lens arrays, directionally refracting, converging, and guiding light from the underlying glitter. When the viewing angle changes, the angle at which light enters these microstructures changes, causing the direction and color of the outgoing light (due to dispersion) to also change, thus creating a sense of "motion" and "three-dimensionality."

[0025] A crystal glitter card prepared by the aforementioned process comprises, from the substrate upwards, a printed graphic layer, a glitter base layer, and a digital enhancement layer.

[0026] This new product is defined by its hierarchical structure (printed graphic layer / glitter base layer / digital enhancement layer). Its function is to seek protection from the perspective of the "product" rather than the "method," which means that any unauthorized manufacture, sale, or use of cards with this specific layered structure, regardless of whether the exact process is used, may constitute infringement, thus providing broader and more direct legal protection.

[0027] Optionally, the digital enhancement layer is optically coupled to the glitter base layer, so that the card surface presents a dynamic three-dimensional dazzling effect that changes with the viewing angle.

[0028] This paper summarizes the close physical contact and optical interaction between the glitter base layer and the digital enhancement layer. The principle is that light waves at the interface between the two layers undergo complex transmission, reflection, and mode coupling. The optical coupling between the digital enhancement layer and the glitter base layer gives the card surface a dynamic, three-dimensional, iridescent effect that changes with the viewing angle. It clarifies that "optical coupling" is the fundamental mechanism for producing this visual effect, directly linking the product structure to its final performance.

[0029] The application of a special adhesive in the preparation of crystal glitter cards as described above, wherein the special adhesive is a screen printing adhesive with high light transmittance and high refractive index, used to mix with iridescent glitter to form glitter printing material, and as an optical medium to enhance the dazzling effect of the cards.

[0030] This claim protects the use of the adhesive of the specific formulation in this specific innovative scenario (i.e., in combination with digital enhancement technology to create dynamic, three-dimensional, iridescent effects). It emphasizes that the adhesive is not a conventional material in this invention, but an indispensable component for achieving the key technical effects.

[0031] Compared with the prior art, the technical solution provided by this invention has the following advantages:

[0032] Superior visual effects: Through the synergistic optical effect of the glitter base layer and the digital enhancement layer, a multi-angle, multi-layered dynamic three-dimensional dazzling effect that traditional processes cannot achieve is realized, greatly enhancing the visual value and attractiveness of card products.

[0033] Stable and reliable process: The special adhesive formula and optimized screen mesh ensure uniform distribution of glitter, good powder lifting ability and stability of the printing process, effectively avoiding problems such as screen clogging, sagging and settling.

[0034] The product boasts superior performance: the resulting cards not only have outstanding visual effects, but also possess high gloss, high light transmittance, excellent wear resistance, and resistance to yellowing, ensuring the long-term preservation value of the product. Attached Figure Description

[0035] Figure 1 A flowchart illustrating the manufacturing process of a crystal glitter card with a dynamic three-dimensional iridescent effect, as proposed in an embodiment of the present invention; Detailed Implementation

[0036] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments.

[0037] Example 1

[0038] Combined with appendix Figure 1 A manufacturing process for a crystal glitter card with a dynamic, three-dimensional, dazzling effect includes the following steps:

[0039] Document preparation and basic printing;

[0040] Glitter printing material preparation: Mix iridescent glitter with a special adhesive. The special adhesive is an environmentally friendly screen printing adhesive with high light transmittance and high refractive index.

[0041] Screen printing glitter layer: Use a screen with a mesh size of 35-50 to print glitter ink onto the card surface to form a glitter base layer, and then pre-dry it;

[0042] Digital enhancement process: A UV embossed layer with a three-dimensional microstructure is applied to the pre-dried glitter base layer using a digital enhancement process;

[0043] Post-treatment and curing.

[0044] The process chain operates according to a hierarchical principle of "base-enhancement-multiplication." Base printing provides the card's basic information carrier. Glitter ink preparation and screen printing constitute the "enhancement layer," forming a medium rich in high-refractive-index particles on the surface, transforming simple surface reflection into complex scattering from glitter at different depths and angles, laying the foundation for vibrant colors. Digital enhancement is the "multiplication layer," which works by constructing a pre-defined, smooth microscopic optical structure (such as a prism or lens array) on top of the enhancement layer. This structure refocuses, refracts, and directionally reflects the scattered light from the underlying layer at a specific angle, "regulating" and "amplifying" the originally diffuse glare, thus creating a strong sense of dynamism and three-dimensionality as the viewing angle changes. The order of the entire process is crucial; if UV embossing is done before screen printing glitter, the optical structure will be destroyed, preventing the coupling effect from being achieved.

[0045] The particle size of iridescent glitter is smaller than that of regular packaging and decorative glitter.

[0046] Smaller particle size means a greater number of glitter particles can be distributed per unit area. When light shines on them, the combined effect of more and denser tiny reflective points creates a more uniform and delicate glossy background. Although the intensity of light reflected by a single small particle may be weaker than that of a larger particle, the extremely high particle density compensates for this and allows for a richer and softer optical transition effect through more precise coordination with the upper microlens array, avoiding abrupt flashes. Conventional glitter typically uses relatively large particle sizes to achieve a strong visual impact. Their approximate range is as follows:

[0047] Common range: 0.125 mm (125 μm) to 0.5 mm (500 μm) or even larger.

[0048] Mesh size conversion: This range roughly corresponds to 30 to 120 mesh (the larger the mesh number, the smaller the particle size).

[0049] 30 mesh: with an aperture of about 0.6mm, it can pass through very large particles, and has a very rough and shiny visual effect. It is often used for packaging with large-area coating or for viewing from a distance.

[0050] 60-100 mesh: This is the most commonly used range in packaging decoration, balancing a shiny effect with a certain degree of fineness.

[0051] To achieve the high fineness and uniformity required for the cards and to match the 40-mesh screen (approximately 0.4 mm aperture), the glitter particles selected in this invention have a particle size significantly smaller than 0.1 mm (100 μm).

[0052] A reasonable optimization range is likely between 20 μm and 80 μm (approximately 200 mesh to 400 mesh or even higher). Within this range, the glitter particles are finer and more densely distributed per unit area.

[0053] Comparison and advantages:

[0054] Conventional glitter (~125-500μm): Large particles with strong individual light reflection, but sparse distribution, resulting in a strong "grainy" feel. The surface is rough, making it unsuitable for printing fine graphics and text, and also unable to finely couple with the microlens structure on the upper layer.

[0055] This invention optimizes the glitter (~20-80μm): the particles are small, and the number of particles per unit area is large, which can form a more uniform and delicate glossy background. Although the reflection of a single particle is weak, the huge number advantage can compensate for the intensity and produce a more precise and richer optical coupling effect with the microstructure of the digital enhancement layer (UV embossing), thereby achieving a dynamic and three-dimensional visual effect, rather than simply "sparkling".

[0056] The specialized adhesive comprises the following components by weight percentage: 40-55% aromatic modified acrylate resin, 15-25% solvent-based polyurethane resin, 4-8% high refractive index antireflective agent, 15-25% mixed solvent, 1-3% thixotropic agent, 0.5-1.5% anti-settling agent, 0.1-0.5% defoamer, 0.1-0.5% leveling agent, and 0.1-0.3% anti-yellowing agent. The aromatic modified acrylate resin, as the main film-forming material, possesses a high refractive index in its molecular structure, laying the foundation for the high refractive index of the entire system. The introduction of polyurethane resin provides toughness and adhesion through the flexibility of its molecular chains, preventing film brittleness. High-refractive-index antireflective agents (such as benzyl benzoate) contain conjugated structures like benzene rings in their molecules, which effectively increase the overall refractive index (n-value) of the mixture and reduce the refractive index difference between the adhesive and the glitter. According to the Fresnel equation, this reduces interfacial reflection loss, increases light transmission, and allows light to penetrate deeper into the glitter layer and be reflected, thereby enhancing gloss and iridescence intensity. Thixotropic agents / anti-settling agents, on the other hand, form a weak three-dimensional network structure, causing the adhesive to be in a gel state (supporting the glitter) when at rest, and then become a free-flowing sol state when sheared by the screen printing squeegee. After printing, it returns to the gel state, thus perfectly solving the problems of large particle suspension and printability.

[0057] The screen printing mesh count is 40 mesh. The mesh count determines the opening size of the mesh and the thickness of the wire. If the mesh count is too low (e.g., 30 mesh), the openings are too large, causing excessive ink to pass through, resulting in uneven accumulation and a rough surface. If the mesh count is too high (e.g., above 60 mesh), the openings are too small, preventing glitter particles from passing through smoothly, causing "screen clogging," resulting in sparse glitter on the printed product and a weak effect. 40 mesh is an experimentally optimized balance point; it forms a sufficiently thick adhesive layer to embed the glitter and create an "immersive" effect. This thickness precisely induces the "microlens effect"—each glitter particle encased in adhesive acts like a tiny lens, working in conjunction with the upper digital enhancement macrostructure, which is one of the keys to creating a three-dimensional effect.

[0058] The mixing weight ratio of glitter to adhesive is 1:1. If the adhesive ratio is too high, the glitter density will decrease, weakening the visual effect, and an excessively thick film may affect drying and subsequent processing. If the glitter ratio is too high, the adhesive will not be able to completely coat all the glitter particles, resulting in protruding particles, a rough surface, reduced adhesion, and the inability of the upper digital enhancement varnish to form a completely smooth surface, severely impairing the optical effect. The 1:1 ratio is a "critical point" determined experimentally based on specific material characteristics (such as glitter particle size, density, and adhesive solid content), maximizing visual impact while ensuring film quality.

[0059] In the preparation of glitter ink, mixing is performed using low-speed mechanical stirring, followed by a settling and curing process for 15-30 minutes. High-speed stirring introduces a large amount of air, forming bubbles. These bubbles solidify in the film layer after printing, creating defects (fisheyes, pits) and scattering light, affecting transparency and gloss. Low-speed stirring provides sufficient dispersion while avoiding violent eddies and air entrainment. The curing process is a physical stabilization process, similar to allowing the material to "rest," enabling the thixotropic agent network to fully rebuild, ensuring stable viscosity and uniform flow during printing.

[0060] The UV embossed layer formed in the digital enhancement process is a microfaceted or microlens-shaped structure. The microfaceted structure works similarly to a miniature prism or array of mirrors, splitting light incident at a specific angle (producing iridescent colors) or directional reflection. The microlens-shaped structure acts like countless tiny magnifying glasses or convex lenses, converging light from the glitter region directly beneath it before projecting it outwards. When the observer's angle changes, light from glitter at different locations, converged by different microlenses, enters the eye, creating a stereoscopic visual effect of the image rising, sinking, or moving. Both structures, combined with the random distribution of the underlying glitter, achieve an optical coupling of "randomness" and "order," producing rich layers.

[0061] Specific steps:

[0062] Substrate preparation: 300g white cardboard is selected as the substrate, and basic graphic printing is completed using offset printing.

[0063] Preparation of glitter ink: Weigh 50 parts by weight of multicolored glitter with optimized particle size and mix it with 50 parts by weight of a special adhesive (prepared according to the following formula: 50% aromatic modified acrylic resin, 20% solvent-based polyurethane resin, 6% benzyl benzoate antireflective agent, 20% mixed solvent, 2% hydrophobic silica thixotropic agent, 1% polyamide wax antisettling agent, 0.3% silicone modified polyether defoamer, 0.3% polyether modified silicone oil leveling agent, and 0.2% anti-yellowing agent). Stir at 200 rpm for 10 minutes using a low-speed mixer, and after mixing evenly, let it stand for 20 minutes to mature.

[0064] Screen printing: A 40-mesh polyester screen is used to precisely coat the cured glitter ink onto the designated areas of the card using a screen printing machine, controlling the film thickness. The card is then pre-dried at 80°C for 30 seconds using an infrared drying device.

[0065] Digital Enhancement: Using UV digital inkjet equipment, a preset microlens array pattern of UV varnish is precisely printed on a pre-dried glitter layer, and then instantly cured by a UV LED light source to form a smooth and transparent three-dimensional enhancement layer.

[0066] Finished product: The cards undergo die-cutting and quality inspection to obtain the final product. This product exhibits a strong dynamic three-dimensional iridescent effect from different viewing angles, with a gloss level of over 100 and a light transmittance of over 93%.

[0067] Comparative example:

[0068] Ordinary solvent-based acrylic varnish was used instead of the special adhesive of this invention, and the other steps were the same as in Example 1. The resulting product had a gloss of only about 70, a light transmittance of about 85%, and uneven distribution of glitter with accumulation, resulting in a visual effect far inferior to that of the embodiment of this invention.

[0069] The adhesive required for this process is no longer merely a bonding and film-forming component, but is designed as an "optical medium," needing to balance high light transmittance and refractive matching to ensure the effective transmission of the glitter optical effect. Therefore, the adhesive system of this invention preferably contains aromatic modified acrylic resin and is compounded with high-refractive-index organic antireflective agents, while employing a low-aromatic, low-odor solvent system to balance environmental protection and process adaptability. Specific components and their functions are shown in Table 1.

[0070] By controlling the amount of thixotropic agent and the rheological properties of the system, stable suspension, anti-settling, and good powder-holding ability of glitter in thick film screen printing can be achieved, adapting to 35~50 mesh screens and meeting the load-bearing requirements of larger glitter particles.

[0071] The cards produced using the process of this invention exhibit a visually striking multi-angle, multi-layered iridescent effect created by the coupling of a base layer of glitter and an upper layer of digital enhancement structure; this effect surpasses the visual levels achievable solely by relying on single powder application or conventional screen printing adhesive systems. The adhesive system of this invention combines optical enhancement, printability, and environmental friendliness, effectively avoiding problems such as fogging or insufficient adhesion that occur with traditional solvent-based systems on paper-based lamination.

[0072] Table 1. Adhesive composition, feasibility ratio, and functional description

[0073]

[0074] The performance test results of different adhesive formulations under the same process conditions (comparison of different adhesive formulations (screen printing varnish) applied to ordinary printed sheets, without digital enhancement) are as follows:

[0075] Control group 1 was a common solvent-based acrylic varnish, control group 2 was a water-based acrylic, control group 3 was a conventional PU adhesive without high refractive index additives, and the example was aromatic modified acrylic + PU + high refractive index additives.

[0076]

[0077] Comparative results show that even with conventional polyurethane adhesives, it is difficult to simultaneously achieve high light transmittance, long-term stable suspension of glitter particles, and high-gloss film formation without the introduction of high-refractive-index additives and a dedicated rheology control system. The adhesive of this invention, through multi-component synergistic design, exhibits non-linear improvements in several key performance indicators, a technical effect that cannot be expected by existing technologies.

[0078] Example 2

[0079] A crystal glitter card, manufactured using a specific process, comprises, from the substrate upwards, a printed graphic layer, a glitter base layer, and a digital enhancement layer. Its optical operation follows a sequential process. Ambient light first passes through the digital enhancement layer, where it is modulated (refracted / focused) by the microstructure of its surface. Then, the light continues to penetrate the adhesive in the glitter base layer, illuminating the iridescent glitter particles and being strongly reflected and scattered. The reflected light then passes through the adhesive and digital enhancement layer again, undergoing a second modulation (secondary refraction / orientation). The final emitted light is the result of multiple modulations, and its intensity, direction, and color change significantly with the viewing angle, thus creating a dynamic, three-dimensional visual perception in the human eye.

[0080] The digital enhancement layer and the glitter base layer are optically coupled, giving the card surface a dynamic, three-dimensional iridescent effect that changes with the viewing angle. "Optical coupling" is the core principle of this invention. It doesn't refer to simple physical contact, but rather to the interaction between the optical properties of the upper microstructure and the optical properties of the underlying glitter, and this interaction is non-linear (1+1>2). A single glitter layer only produces iridescence without a three-dimensional effect; a single microlens layer only produces simple gloss changes. However, when the two are closely superimposed, the structural parameters (curvature, focal length) of the microlens match the thickness and refractive index of the glitter layer, allowing the lens to effectively capture and control the light from the glitter layer. This deep interaction amplifies the visual effect, producing a dynamic, three-dimensional iridescent effect with depth that no single layer can achieve.

[0081] Example 3

[0082] An application of a specialized adhesive in the preparation of crystal glitter cards: This specialized adhesive is a screen printing adhesive with high light transmittance and high refractive index. It is used to mix with iridescent glitter to form a glitter ink and serves as an optical medium to enhance the card's dazzling effect. First, as mentioned earlier, it is an optical medium; its high light transmittance and high refractive index properties are fundamental to ensuring unobstructed light paths and enhancing the dazzling effect. Second, it acts as a process bridge; its unique rheological properties (powder-carrying properties, printability) ensure that the glitter layer can be prepared in a high-quality and repeatable manner, providing an ideal optical interface for subsequent digital enhancement layers. Without this functionalized adhesive, the entire technical solution cannot achieve the expected "non-linear enhancement" effect.

[0083] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A manufacturing process for a crystal glitter card with a dynamic three-dimensional iridescent effect, characterized in that, Includes the following steps: Document preparation and basic printing; Glitter printing material preparation: Mix iridescent glitter with a special adhesive, wherein the special adhesive is an environmentally friendly screen printing adhesive with high light transmittance and high refractive index; Screen printing glitter layer: The glitter material is printed onto the card surface using a screen with a mesh size of 35-50 to form a glitter base layer, and then pre-dried. Digital enhancement process: A UV embossed layer with a three-dimensional microstructure is applied to the pre-dried glitter base layer using a digital enhancement process; Post-treatment and curing.

2. The preparation process according to claim 1, characterized in that, The particle size of the iridescent glitter is smaller than that of conventional packaging and decorative glitter.

3. The preparation process according to claim 1, characterized in that, The special adhesive comprises the following components by weight percentage: 40-55% aromatic modified acrylate resin, 15-25% solvent-based polyurethane resin, 4-8% high refractive index antireflective agent, 15-25% mixed solvent, 1-3% thixotropic agent, 0.5-1.5% antisettling agent, 0.1-0.5% defoamer, 0.1-0.5% leveling agent, and 0.1-0.3% antiyellowing agent.

4. The preparation process according to claim 1, characterized in that, The mesh count of the wire mesh is 40.

5. The preparation process according to claim 1, characterized in that, The glitter and adhesive are mixed in a weight ratio of 1:

1.

6. The preparation process according to claim 1 or 5, characterized in that, In the preparation step of the glitter printing material, the mixing is carried out by low-speed mechanical stirring, and after mixing, it is left to stand and mature for 15-30 minutes.

7. The preparation process according to claim 1, characterized in that, The UV embossed layer formed in the digital enhancement process has a micro-faceted or microlens-shaped structure.

8. A crystal glitter card prepared by any one of the preparation processes described in claims 1 to 7, characterized in that, From the substrate upwards, the layers consist of: a printed graphic layer, a glitter base layer, and a digital enhancement layer.

9. The crystal glitter card according to claim 8, characterized in that, The digital enhancement layer is optically coupled to the glitter base layer, giving the card surface a dynamic, three-dimensional, dazzling color effect that changes with the viewing angle.

10. The application of a special adhesive in the preparation of crystal glitter cards as described in claim 8 or 9, characterized in that, The special adhesive is a screen printing adhesive with high light transmittance and high refractive index, which is used to mix with iridescent glitter to form glitter printing material and to enhance the dazzling effect of the card as an optical medium.

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