How does the anti-counterfeiting thermal paper achieve the anti-counterfeiting function?

Anti-counterfeiting thermal paper to achieve anti-counterfeiting function mainly depends on its unique thermal sensitive materials and thermochromic characteristics. The following is the specific way of anti-counterfeiting thermal paper to achieve anti-counterfeiting function:

First, the selection and characteristics of thermal sensitive materials

Anti-counterfeiting thermal paper is usually coated with one or more layers of thermal material on the paper base. These thermal sensitive materials have unique thermal reversible discoloration characteristics, that is, within a certain temperature range, with the change of temperature, the color of the material will also change accordingly. This change is reversible, that is, when the temperature returns to the original state, the color will also return to the original state.

Thermal sensitive materials can be mainly divided into two categories: liquid crystal and colorless dyes. Liquid crystal thermosensitive materials use the properties of temperature-sensitive liquid crystals to change color when the temperature changes, which changes color quickly, is sensitive to temperature changes and has high accuracy. When the thermal sensitive material is heated, the microcapsule breaks, and the colorless dye reacts with the color developer to show a specific color.

Second, anti-counterfeiting mechanism

Heating color development: When the anti-counterfeiting thermal paper is heated at a certain temperature, the thermal material will change, showing specific information or patterns. These messages or patterns may be hidden, not visible under normal circumstances, but become clearly visible after heating.

Cooling fade: When the heat source is removed, the thermal paper gradually cools, the thermal material returns to its original state, and the information or pattern previously displayed also disappears. This reversibility allows the anti-counterfeiting thermal paper to be reused many times.

Information layer protection: In some advanced anti-counterfeiting thermal paper, the information layer is cleverly hidden inside the paper or processed by special processes, making it difficult for counterfeiters to copy or tamper with the anti-counterfeiting information.

3. Application examples

Anti-counterfeiting thermal paper is widely used in bills, certificates, commodity labels and other fields. For example, in bill printing, anti-counterfeiting thermal paper can be used to print bill information with anti-counterfeiting functions, such as invoice numbers, anti-counterfeiting patterns, etc. Consumers or verifiers can verify the authenticity of the ticket through a simple heating operation.

4. Technical advantages and limitations

Technical advantages:

The anti-counterfeiting effect is remarkable: through the unique thermochromic characteristics, the anti-counterfeiting thermal paper can intuitively display the anti-counterfeiting information and is easy to identify and verify by consumers.

High reversibility: the discoloration and fading process of the thermal material is reversible, making the anti-counterfeiting thermal paper can be reused many times.

Wide range of applications: suitable for a variety of fields and occasions, such as bills, documents, commodity labels, etc.

Limitations:

Heat source dependent: The anti-counterfeiting verification process requires the support of heat sources, which limits its use scenarios and convenience to a certain extent.

Technical threshold: The production of anti-counterfeiting thermal paper and the design of anti-counterfeiting mechanism require high technical threshold and cost input.

In summary, the anti-counterfeiting thermal paper achieves effective anti-counterfeiting function through its unique thermal sensitive material and thermochromic characteristics. With the continuous development and innovation of technology, anti-counterfeiting thermal paper will play an important role in more fields.