Security ink screen printing

The anti-counterfeit inks suitable for screen printing features include photochromic inks, fluorescent inks, thermochromic inks, and magnetic inks. These inks have a certain anti-counterfeiting effect for anti-counterfeit packaging.

Photochromic inks can be divided into two types: one is the common type, which refers to the color change of the ink under ordinary sunlight and intense light, from darker to lighter or darker, from colored to colorless, or no Color becomes colored. The other type, namely UV type, means that the ink is colorless or does not change under the illumination of an ordinary light source, but it will show bright red, orange, yellow-green and green fluorescence under ultraviolet irradiation.

The printing inks printed with the fluorescent ink are colorful and have a good decorative effect. Under the action of visible light and ultraviolet rays, they can produce glittering fluorescence. Anti-counterfeiting packaging fluorescent ink can be deployed, the best anti-counterfeiting effect. Different formulations can give different fluorescence effects. It is generally difficult to make realistic counterfeiting, thus forming a security secret.

Thermochromic ink means that the color will change under certain external heating conditions. It can be divided into two categories: one is a plastic type, that is, once the heat source of discoloration is removed, the color of the ink can be restored to the original state; the other is non-plastic, that is, the ink color cannot be restored after the heat source is withdrawn.

Magnetic ink was first used to print codes on credit cards. Because the magnetic card has the characteristics of convenient carrying and quick settlement, it will be widely used. Magnetic ink is used for anti-counterfeiting packaging. It is mainly printed on a certain part of the package with magnetic ink and can be detected by special means to form a secret anti-counterfeit.