I. Core Highlights
· Micro/Nano-Level Precision Engraving: Utilizes high-precision photolithography to engrave extremely fine lines and complex motifs (such as the brand logos in Images 1 & 2, and the sun god relief in Image 3) onto metallic/coated substrates. A layer of optical-grade epoxy is then applied. As light passes through the crystal dome, it creates a magnifying and refracting effect, resulting in a highly impactful 'naked-eye 3D' embossed appearance.
· Crystal Dome Protection: Unlike ordinary flat printing, the high-hardness transparent dome formed by high-transparency epoxy resin not only makes the design appear deep and rich but also causes the micro-textures and base colors (such as the gold photolithographic metallic feel or the 7-color holographic background in Image 2) to exhibit a flowing, luminous transformation.
· Versatile Curved Surface Fit: The edges of the epoxy dome transition smoothly and the curvature can be customized. It perfectly conforms to the curved surfaces of liquor bottle caps and cosmetic lids, achieving a seamless integration between the emblem and the cap body.
II. Practical Performance
· High Hardness & Scratch Resistance: The cured optical epoxy layer possesses high hardness (typically 2H–3H), effectively resisting scratches from daily friction and packaging impacts, ensuring the design remains pristine.
· Superior Chemical Corrosion Resistance: The epoxy offers excellent water, oil, alcohol, and daily chemical solvent resistance. It is particularly suitable for liquor bottle caps (exposed to alcohol vapors) and cosmetic lids (exposed to powders and oils).
· Long-Lasting UV Resistance: The cured layer effectively blocks UV rays, preventing the photolithographic base and underlying inks from yellowing or fading under prolonged exposure to strong shelf lighting.
III. Packaging Process Description
Core Technology: Photolithography Master Making + Micro/Nano Embossing + Optical Epoxy Curing
1. Precision Photolithography (Core Differentiator): High-precision photolithography and electroforming technologies are used to create a metallic texture master with micron-level accuracy, fully reproducing the brand logo details (as seen in the intricate sun face details in Image 3).
2. Texture Transfer & Base Coating: The photolithographic texture is transferred onto the film substrate via UV embossing or electroforming. Base colors such as gold, silver, or 7-color holographic finishes are applied according to client specifications (as shown in the red-gold design in Image 1 and the gradient holographic effect in Image 2).
3. Precision Epoxy Dispensing: A high-precision CNC dispensing machine injects optical-grade high-transparency epoxy resin into the designated area. The liquid's surface tension naturally forms a rounded, full convex dome.
4. Stepwise Curing: The product passes through a multi-zone thermal curing tunnel or UV curing process to ensure simultaneous and thorough curing of the interior and exterior, eliminating bubbles and shrinkage to achieve a high-definition crystal-clear surface.
5. Irregular Die-Cutting & Waste Removal: Precision CNC die-cutting is performed according to the cap/lid design (circular or inverted trapezoidal) with automatic waste removal, leaving the release paper intact for automated or manual application.
IV. Application Scenarios & Solutions
· Premium Chinese Baijiu / Liquor Bottle Caps (Core Scenario 1): As shown in Images 1 & 2 for Kouzijiao (a premium Baijiu brand). Solution: The photo-lithography epoxy emblem presents a 'security-grade' 3D brand logo with a metallic embossed effect on the bottle cap top. Coupled with the gold-and-red base, it conveys a sense of prestige, age, and brewing heritage, significantly enhancing the ceremonial experience when opening the bottle at high-end banquets.
· Luxury Beauty & Cushion Compact Lids (Core Scenario 2): As shown in Image 3 for cosmetic lids. Solution: Provides a 'jewelry-grade' lid decoration. The micro-relief detailing not only makes the brand logo three-dimensional but, when combined with an overall gilded design, instantly elevates the 'haute couture' feel of the cosmetics, meeting the aesthetic demands of high-end skincare and makeup consumers.
· Brand Co-Branded Limited-Edition Packaging: Suitable for limited-edition perfumes and premium gift boxes. Solution: Utilizes photolithography to create highly recognizable IP characters or motifs, combined with the luscious texture of epoxy, turning the packaging itself into a collectible cultural art piece.
· Automotive / Luxury Accessories Badges: Car key fobs, luxury luggage hardware accessories. Solution: Provides metal + epoxy badges with exceptional hardness and wear resistance, maintaining bright luster and fine details even under long-term outdoor exposure and high-frequency friction.