How is the matte silver effect of PET thermal matte silver paper achieved?

The matte silver effect of PET thermal matte silver paper is mainly achieved by special coating process and formula. Specifically, the process may include the following key steps:

1. Coating process

Undercoat treatment: The first undercoat treatment is performed on the PET substrate, and this layer is usually used to improve the surface characteristics of the substrate, such as increasing adhesion, flatness, etc., to provide a good basis for the subsequent matte silver coating.

Matte silver coating: After the primer dries, apply a special matte silver coating. This coating may contain pigments, binders, and other additives to achieve the desired matte silver effect by precisely controlling the thickness and uniformity of the coating.

Dry curing: After the matt silver coating is finished, it needs to be dried and cured. This step is usually done by means such as heating or UV irradiation, which causes the adhesive in the coating to cure and form a stable matte silver surface.

2. Formula design

Pigment selection: The key to the matte silver effect is the choice of pigment. Specific silver pigments are used in matte silver coatings, which are able to show a similar color to silver when exposed to light, but by adjusting the particle size and distribution of the pigment, a matte effect can be achieved to reduce reflection.

Adhesives and additives: Adhesives in matte silver coatings serve to hold the pigment to the substrate, while affecting the flexibility and durability of the coating. Additives such as defoaming agents, dispersants, preservatives, etc. are used to improve the processability and stability of the coating. In particular, to enhance the matte silver effect, the formulation may contain ingredients capable of forming a slightly rough surface, such as nanoparticles such as high-temperature alumina, which form an uneven structure on the coated surface and diffuse reflection when light is incident, thus achieving a matte effect.

3. Realization mechanism of matte silver effect

Diffuse reflection: The slightly rough structure of the matte silver coating surface makes the light diffuse at incident, that is, the light is scattered in all directions rather than reflected in a single direction. This diffuse reflection reduces the intensity of the direct reflection of the light, thus achieving a matte effect.

Color uniformity: By precisely controlling the size and distribution of pigment particles and the thickness and uniformity of the coating, it is possible to ensure that the matte silver coating presents a uniform color effect.

In summary, the matte silver effect of PET thermal matte silver paper is achieved through a special coating process and formulation design, where the coating process ensures the uniformity and stability of the coating, while the formulation design achieves the desired matte silver effect by selecting the appropriate pigments, adhesives and additives and adjusting their proportions and distributions.