ST-AC433 Anti-Counterfeiting Coating

Product Introduction:
ST-AC433 anti-counterfeiting coating is a kind of ultraviolet fluorescent ink. After printing, there is no trace on the printing substrate. Under ultraviolet light, the required colors, characters and patterns can be displayed. There are more than 10 colors such as red, yellow, blue, grass green, etc. Since there is no trace of printing on the surface, it is also called invisible ink. Now most products on the market use this type as an anti-counterfeiting means.

ST-AC433 Anti-counterfeiting coating

Uses

Mainly used for printing anti-counterfeiting of tobacco, alcohol, pharmaceuticals, cosmetics, beverages, food, electronic products, and self-adhesive labels.

Performance indicators

Color category	ST-AC433
Show fluorescent red under ultraviolet light	Colorless - Red
Show fluorescent blue under ultraviolet light	Colorless - Blue
Show fluorescent yellow green under ultraviolet light	Colorless - Yellow Green
Show fluorescent emerald green under ultraviolet light	Colorless - Emerald Green
Show fluorescent grass green under ultraviolet light	Colorless - Grass Green
Show fluorescent yellow under ultraviolet light	Colorless - Yellow
Show fluorescent white under ultraviolet light	Colorless - White
Show fluorescent orange under ultraviolet light	Colorless - Orange
Show fluorescent orange under ultraviolet light（Seal specific red）	Red - Orange

Construction process suggestions

Printing equipment cleaning

It is best to use new ink rollers when in use. If using old ink rollers and printing plates, please thoroughly clean the ink rollers and printing plates, because even a very small amount of colored ink will affect the invisible effect of this ink.

Materials and ink layer thickness

(1) Materials. The printing substrate can be various materials such as paper, plastic film, metal, glass, rubber, etc. Materials without chemical brighteners have the most ideal effect. Materials containing brighteners will significantly weaken the fluorescence effect. When printing on materials coated with certain chemicals, the fluorescence may gradually disappear. Therefore, it is recommended to use high-concentration type A fluorescent ink for printing. For type B, a layer of fluorescent black can be printed first to cover the fluorescent agent on the paper.

(2) Ink layer thickness. The thinner the ink layer, the weaker the fluorescence effect. The thicker the ink layer, the stronger the fluorescence effect, but at the same time, the imprint is also more obvious.

The ink is not absolutely colorless or without any imprint.

On white paper, even if completely transparent and colorless varnish is printed, due to the different refractive and reflective coefficients of paper and varnish, there will be a visual difference, forming a difference between oil stains and the brightness of the paper surface. The invisible effect is better in the following situations:

(1) Printed on rough paper with good water absorption;

(2) Printed next to lines, characters, etc.;

(3) Varnishing or laminating on the surface of printed matter.