Anti Counterfeiting Material

anti counterfeiting powder, also known as anti counterfeiting pigment, is divided into two types: ultraviolet fluorescent powder and infrared fluorescent powder. It appears as a white or colorless powder. When exposed to ultraviolet light with a wavelength of 200-400nm or infrared light with a wavelength of 780-1060nm, it exhibits bright colors such as fluorescent red, fluorescent blue, and fluorescent yellow-green. The color disappears instantly when it is no longer exposed to the corresponding wavelengths of fluorescent lamps. anti counterfeiting powder can be used repeatedly.

When light passes through a transparent material, it undergoes reflection, absorption, and transmission. These effects cause the material to exhibit certain colors under the influence of light. The phenomenon of optical properties occurs during the absorption stage of light by the material, where non-reflective or non-scattered light enters the object, and some light is absorbed and converted into thermal energy, while the rest is reflected and scattered within the object. Certain substances can re-emit the absorbed light within the visible range, known as fluorescence. This fluorescence is accompanied by the appearance of color. Some light may undergo internal reflection, while the remaining light is transmitted. Ultraviolet and infrared fluorescent anti counterfeiting powders are types of fluorescent pigments, and their luminescent mechanism is similar to that of fluorescent pigments.

The common types of anti counterfeiting materials include:

1. Ultraviolet fluorescent anti counterfeitingtechnology: Special inks that emit visible light (400-800nm) when exposed to ultraviolet light (200-400nm).
2. Thermal anti counterfeitingtechnology: anti counterfeitingtechnology that undergoes color change effects when subjected to heat.
3. Reaction color-changing anti counterfeitingtechnology: Various chemical substances added to paper that undergo chemical reactions under certain conditions, causing the paper to change color and achieve anti counterfeitingpurposes.
4. Magnetic anti counterfeitingtechnology: Special anti counterfeitingtechnology that incorporates magnetic iron oxide powder mixed into paper, primarily used for printing magnetic coded words and symbols on banknotes for recording and storing information.
5. Disappearing ink technology: This type of anti counterfeitingtechnology involves adding substances that can undergo biochemical reactions, allowing an invisible mark to be applied to packaging or printed materials. By using specific chemical reagents based on the formula and applying slight heat, moisture, friction, or other methods, the text or pattern will be revealed.
6. Spot color printing ink: Printing ink made by mixing colorants, fillers, and binders, where the choice of colorants is crucial in determining the color and vividness of the prints.

anti counterfeiting powders possess the following features:

1. Vibrant colors and excellent coverage (no need for additional opaque agents).
2. Fine spherical particles that are easily dispersible, with a diameter of approximately 1-10μm (98%).
3. Good heat resistance, withstanding temperatures up to 600°C, suitable for various high-temperature processing methods.
4. Good solvent resistance, acid resistance, alkali resistance, and high stability.
5. No color shifting.

anti counterfeiting pigments can be used to produce various anti counterfeiting inks and coatings, such as gravure printing, screen printing, flexographic printing, various UV printing, plastic coatings, industrial coatings, automotive coatings, metal coatings, and various UV coatings.