How does Cigarette Pack Reverse UV Topcoat use ultraviolet light to achieve high-contrast presentation of patterns?
Release Time : 2024-11-06
Cigarette Pack Reverse UV Topcoat uses ultraviolet light (UV) to achieve high-contrast presentation of patterns. This technology involves the application of UV light-curing coatings and special printing processes.
1. Basic principles of UV light-curing coatings
UV light-curing coatings are a special type of coating that cures quickly when exposed to ultraviolet light. Its main ingredients include:
Photoinitiator: absorbs ultraviolet energy and initiates chemical reactions in the coating.
Monomers and oligomers: provide curing materials for the coating.
Additives: improve the properties of the coating, such as fluidity, durability, etc.
2. Reverse UV topcoat process
The reverse UV topcoat process is usually carried out after printing is completed. The specific steps are as follows:
Printing pattern: First print the desired pattern on the surface of the cigarette box, usually using ink.
Masking non-curing areas: Use a masking layer (such as white ink) to mask in areas where the texture of the base paper needs to be retained to prevent UV light-curing coating from penetrating.
Apply UV light-curing coating: Apply a thin layer of UV light-curing coating evenly on the entire printed surface. The coating will cover the entire surface, including the shielded area and the non-shielded area.
3. UV curing process
After coating, the coating surface is irradiated by a UV light source (such as a UV lamp). The UV energy is absorbed by the photoinitiator in the coating, triggering a rapid photochemical reaction, causing the coating to cure rapidly.
Curing the shielded area: The UV light-curing coating on the shielding layer will cure to form a protective layer to maintain the texture of the shielded area.
Non-curing area: The area under the shielding layer is blocked by the shielding layer, and the UV light-curing coating will not cure, maintaining the texture of the base paper.
4. Forming a high-contrast effect
Through the above process, two different texture areas are formed on the surface of the cigarette box:
Uncured area: Maintain the texture of the base paper, the color is lighter, and has a soft visual effect.
Cured area: The UV light-curing coating forms a high-brightness, high-reflective texture, the color is darker, and has a strong visual effect.
5. Enhanced effect and details
High contrast contrast: The bright reflection of the cured area and the soft texture of the uncured area form a strong contrast, enhancing the three-dimensional sense and visual impact of the pattern.
Detail presentation: The fast curing characteristics of UV light-curing coatings make the printed details clearer and less likely to be blurred or distorted due to manual operation.
Cigarette Pack Reverse UV Topcoat uses the characteristics of ultraviolet light curing to achieve high-contrast presentation of the pattern through the curing difference between the shielded and unshielded areas. The brightly cured area forms a sharp contrast with the uncured area of the base paper texture, enhancing the visual effect and three-dimensional sense. This technology is widely used in high-end packaging printing to enhance the texture and market appeal of the product.
1. Basic principles of UV light-curing coatings
UV light-curing coatings are a special type of coating that cures quickly when exposed to ultraviolet light. Its main ingredients include:
Photoinitiator: absorbs ultraviolet energy and initiates chemical reactions in the coating.
Monomers and oligomers: provide curing materials for the coating.
Additives: improve the properties of the coating, such as fluidity, durability, etc.
2. Reverse UV topcoat process
The reverse UV topcoat process is usually carried out after printing is completed. The specific steps are as follows:
Printing pattern: First print the desired pattern on the surface of the cigarette box, usually using ink.
Masking non-curing areas: Use a masking layer (such as white ink) to mask in areas where the texture of the base paper needs to be retained to prevent UV light-curing coating from penetrating.
Apply UV light-curing coating: Apply a thin layer of UV light-curing coating evenly on the entire printed surface. The coating will cover the entire surface, including the shielded area and the non-shielded area.
3. UV curing process
After coating, the coating surface is irradiated by a UV light source (such as a UV lamp). The UV energy is absorbed by the photoinitiator in the coating, triggering a rapid photochemical reaction, causing the coating to cure rapidly.
Curing the shielded area: The UV light-curing coating on the shielding layer will cure to form a protective layer to maintain the texture of the shielded area.
Non-curing area: The area under the shielding layer is blocked by the shielding layer, and the UV light-curing coating will not cure, maintaining the texture of the base paper.
4. Forming a high-contrast effect
Through the above process, two different texture areas are formed on the surface of the cigarette box:
Uncured area: Maintain the texture of the base paper, the color is lighter, and has a soft visual effect.
Cured area: The UV light-curing coating forms a high-brightness, high-reflective texture, the color is darker, and has a strong visual effect.
5. Enhanced effect and details
High contrast contrast: The bright reflection of the cured area and the soft texture of the uncured area form a strong contrast, enhancing the three-dimensional sense and visual impact of the pattern.
Detail presentation: The fast curing characteristics of UV light-curing coatings make the printed details clearer and less likely to be blurred or distorted due to manual operation.
Cigarette Pack Reverse UV Topcoat uses the characteristics of ultraviolet light curing to achieve high-contrast presentation of the pattern through the curing difference between the shielded and unshielded areas. The brightly cured area forms a sharp contrast with the uncured area of the base paper texture, enhancing the visual effect and three-dimensional sense. This technology is widely used in high-end packaging printing to enhance the texture and market appeal of the product.