1. Fluorescent ink anti-counterfeiting technology
Fluorescent inks, also known as colorless fluorescent inks and invisible inks, are made by adding a corresponding visible fluorescent compound to a conventional ink, and emit visible light (wavelength of 400) under ultraviolet light (wavelength of 200-400 nm). ~800nm). In general, fluorescent inks are commonly used in the printing field.
In the "Jiuhe Open Source" LOGO of the self-adhesive label of the fruit and vegetable chewable tablets series, our company has adopted the anti-counterfeiting technology of fluorescent ink. In order to ensure the good fluorescent anti-counterfeiting effect of the printed products, special attention should be paid to cleaning the ink supply system components such as the ink tank, the ink roller and the anilox roller used for printing the fluorescent ink to prevent other inks from being mixed therein. In addition, after the printing is completed, the printed matter needs to be inspected under the ultraviolet light source to ensure the anti-counterfeiting effect. When the printed product is illuminated by normal light source, the color of the upper part of the LOGO shows an ordinary low color gamut orange; however, under the illumination of the ultraviolet light source, the color of the upper part of the LOGO exhibits a high color gamut of fluorescent red.
2, micro-text anti-counterfeiting technology
Micro-text is a special printing anti-counterfeiting technology that uses very small letters or letters to form information such as lines or patterns. If you don't look carefully, this line or pattern information is not much different from ordinary lines or patterns. When you use a high magnification magnifier or microscope to see the small text or letter content contained in it.
In the series of self-adhesive labels for fruit and vegetable chewable tablets, our company implemented the micro-text anti-counterfeiting technology on the letter "T" of the "Jiuhe Open Source" LOGO registration mark "TM", using the "Jiuhe" Chinese Pinyin "JIUHE" Formed the letter "T".
The application of this anti-counterfeiting technology makes it difficult to obtain the label information and falsification through high-precision copiers, scanners, etc. Because once the microtext is copied or scanned, the "line" consisting of small letters or letters becomes a real line. No matter how it is enlarged, the small text or letters are not discernible, thus preventing the fake. effect.
The micro-text anti-counterfeiting technology can be easily realized on the self-adhesive label of the fruit and vegetable chewable tablets series, mainly thanks to the high-resolution CDI technology used in the printing of the series of labels, and the flexo printing machine can achieve precise "touch" Kiss-style "pressure control, even if the text is very small, can show extremely clear printing results, reaching a very high level of fine printing, so that the anti-counterfeiting effect of micro-text can be maximized.
3, optical color ink anti-counterfeiting technology
Optical color-changing ink is the most complex interference-type anti-counterfeiting ink today, and its color-changing effect is realized by the light-changing pigment in the ink. The optically variable pigment is prepared by a series of materialization treatments such as pulverization of an optically variable film having specific spectral characteristics. The optically variable film is formed by sequentially depositing each material of different refractive index on the same carrier under the design conditions of a specific film structure under high vacuum conditions. Once the film thickness satisfies the interference condition of light, after the light is irradiated, a series of light interference phenomena will occur in the film layer, and the color changes with the change of the viewing angle of the human eye. Because this kind of optical color-changing ink anti-counterfeiting technology has the characteristics of convenient printing, no need for any instrument identification, strong concealment and the like, it is currently favored by users. Our company has actively cooperated with ink suppliers to develop a special optical color-changing ink and apply it to the color blocks of the fruit and vegetable chewable tablets series ("fruit and vegetable chewable tablets" text, and the right side of the label. The large curved design pattern), this is the first time that our company implemented the "green to red" optical color-changing ink on the flexo label. It can be called the optical anti-counterfeiting technology in the field of label application. After applying this technology, consumers can see the authenticity of the product by changing the different visual angles to see the local color block transition from green to red.
Fruit and vegetable chewable tablets series of self-adhesive labels, in addition to the advantages of good color consistency and strong level of expression, which are common to flexo-printed self-adhesive labels, the excellent anti-counterfeiting effect has been highly recognized by customers. Although the design of this series of self-adhesive labels seems simple, due to the proper consideration of anti-counterfeiting technology in the planning stage of the process, and the reasonable use in the implementation stage, this series of seemingly simple flexo printing will not be done. Labels are no longer simple.
The above content is selected from the 6th issue of 2011, Printing and Printing Technology and Label Technology , and more journal content please pay attention to the journal channel .
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