Postpress Technology 1000 (450-454)

450. What is a color film? What are the characteristics of the color film?

A: The color film is a kind of hot stamp material that is peeled onto the paper after drying and depositing a layer of mixed paint such as a pigment and a binder on a smooth surface such as glass.

The production of color chips has a history of nearly 60 years. Before color foil was used, all kinds of colored graphics were stamped with this material. The characteristics of the color film are: the production process is simple, easy to process, the color is bright, the thick trace is full, the color quality is pure, and the light is not easy to reflect, but because the color sheet itself is not easy to damage, it can not be continuous hot stamping.

451. What is hot stamping adhesion aid? Which kind?

A: It refers to the material used to assist the bonding when the hot stamping material is not adhesive (such as metal foil, etc.) or the bonding ability is not enough, and the hot stamping adhesive is not on the imprinting. The sticking material is the adhesive powder and the adhesive material fluid. Species.

452. What is adhesive powder? What are the types of adhesive powder used for hot stamping?

A: Adhesive powder refers to the powdery auxiliary material. There are three types of adhesive powder used for hot stamping.

The first kind: Rosin powder, which is a kind of resin obtained by cutting from the pine trunk, is made by drying and smashing, and the main component is rosin acid.

The second type: protein powder, which is an adhesive powder made from poultry egg protein. Protein powder can be used along with the production, the method is: first remove the poultry eggs, egg yolk, and then put the remaining egg white in a smooth and clean storage, dried and then used to mash into a fine powder. However, the production quantity should be determined according to needs, not too much, nor can it be stored for a long time because the protein is prone to bacterial growth and rots; in addition, the amino acids contained in the protein are easily deliquified to reduce the viscosity when the humidity is high.

The third type: hot stamping powder, is a kind of powdered hot stamping adhesive material made of rosin or shellac. This bronzing powder is available for purchase without adding other ingredients, is easy to use, and can be stored within a certain period of time, but the price is slightly more expensive.

453. What is glue liquid? What are the types of adhesive liquid used for hot stamping?

Answer: Adhesive liquid refers to liquid-like helper material. There are two kinds of adhesive liquid used for hot stamping.

The first kind: shellac, shellac, also known as shellac, dry paint and so on. The main component of shellac is esters of light acid, insoluble in water, soluble in alcohol and alkaline solution, slightly soluble in esters and hydrocarbons. Shellac is soft, softened by heat, and decomposes at higher temperatures. Due to its strong adhesive properties, it is a good hot stamping adhesion promoting material. Alcohol in the shellac can also be smeared on smooth objects.

Second: protein liquid, in addition to powdery protein binder can be used for hot stamping adhesion, the liquid protein liquid can also be directly applied to the surface of the object for hot stamping adhesive. The method is: The protein solution proposed from the egg is directly smeared with cotton or the like on the hot stamped portion. The protein liquid is prone to breeding bacteria, and is easy to dry. When used, it is not suitable to extract too much, and it is used with the use of extraction, and can not be stored.

454. What kind of material is applied to adhesive powder and adhesive material?

A: The co-adhesive powder is suitable for surfaces with voids, such as fabrics, papers, etc. If there is no void on the surface of the surface, powdery adhesion aids are not available because the surface is smooth and the powder is used to help Easy to slide off. The assisting mucus is suitable for smooth surfaces such as leather, PVC, etc., but it cannot be used for materials with voids on the surface because the liquid adhesive can easily penetrate into the gaps of the surface and make the surface of the surface to be stamped. Dirty, affecting the appearance quality of the stamp, because the adhesion promoter itself has a color.

(author/Wang Huaizhu)