1. Material Selection

The dazzling appearance of this bag is inseparable from the specific materials chosen, mainly including:

• Base Materials: PVC (polyvinyl chloride), TPU (thermoplastic polyurethane), or PET (polyethylene terephthalate). These materials feature high transparency, durability, and flexibility, making them ideal for processing into bags.
• Holographic Film/Laser Film: This thin film is the key component responsible for creating the vibrant optical effects.

2. Holographic Film Manufacturing Process

The brilliant effect of the holographic film originates from its microscopic surface structures. These structures, through the interference and diffraction of light, break light into different colors, forming a rainbow-like effect. The manufacturing process includes:

(1) Photolithography:
Using lasers to perform photolithography on the surface of the film, fine grooves or patterns are created by controlling the laser energy and path. These micro- or nano-scale grooves alter the direction of light propagation, producing refraction and interference effects.

(2) Metal Coating:
Sometimes, to enhance the reflective effect, a thin metal layer (such as aluminum or silver) is applied on the holographic film. This metal coating not only enhances the optical effect but also increases the brightness of the film.

(3) Multilayer Composite:
High-end holographic films may consist of multiple layers of transparent or semi-transparent materials with different refractive indices. As light passes through these layers, it is separated into various colors, further enhancing the dazzling effect.

3. Bonding the Holographic Film with the Substrate

To transfer the holographic effect onto the bag, the holographic film must be combined with a transparent substrate (such as PVC or TPU). Specific methods include:

(1) Heat Press Lamination:
Under high temperature and pressure, the holographic film and transparent plastic are bonded together to form a single unit. This process ensures the stability and durability of the holographic effect.

(2) Adhesive Bonding:
A transparent adhesive is applied between the holographic film and the plastic material, followed by a pressing process. This method is particularly suitable for small batch or custom production.

(3) Composite Film Technology:
The holographic film is embedded as a layer within a multilayer composite structure, which can enhance the overall strength and waterproof performance of the material.

4. Cutting and Processing

The bonded holographic film material is then cut into the desired bag shape. High-frequency heat press technology is used to seal the edges, ensuring that the seams are both secure and aesthetically pleasing. Additional accessories, such as zippers and rivets, are installed to complete the assembly.

5. Achieving the Color Effects

• Light Interference and Diffraction:
  The complex pattern design on the holographic film surface causes light of different wavelengths to scatter at different angles, creating a dazzling visual effect.
• Angle Dependency:
  The effect changes with the angle of observation and the light source, adding dynamic beauty to the bag.
• No-Dye Design:
  The brilliant effect is entirely derived from the optical structure without the need for additional chemical dyes, making it eco-friendly and resistant to fading.

6. Additional Characteristics

• Durability:
  Once bonded, the laser film exhibits excellent scratch resistance and wear durability.
• Waterproofing:
  The combined material retains the waterproof properties of the transparent plastic, making it ideal for cosmetic bags or toiletry bags.
• Fashion Appeal:
  Due to its unique visual effect, this material is often used in high-end or trendy product designs.

Summary:
The dazzling effect of this bag is a fusion of high technology and fashion design. Through precise processes such as holographic photolithography and heat press lamination, the holographic film is merged with a transparent substrate to achieve a brilliant optical display. This design not only delivers stunning aesthetics but also offers practical durability and environmental benefits.

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