Anti-counterfeiting method integrating dark lines, latent images and unlocking through embossing

Abstract

The invention relates to the anti-counterfeiting technical field, in particular to an anti-counterfeiting method integrating dark lines, latent images and unlocking through embossing. The method comprises the steps of manufacturing grids composed of hemispherical-shaped uniformly arranged dots, carving unlocking hidden patterns, carving the latent images, carving the dark lines, carrying out electrolytic polishing, plating with chromium and embossing. Compared with the prior art, the method has the advantages that the three anti-counterfeiting technologies of the dark lines, the latent imagesand unlocking are combined into a whole, a laser direct engraving machine is adopted for carving, embossing is carried out on a printing object through an embossing process, the engraved dots are in athree-dimensional hemispherical shape, the stereoscopic impression of the manufactured anti-counterfeiting patterns is stronger, the fineness of carved net line scan reach 200 lines / centimeter, the anti-counterfeit effect is better, in addition, printing ink is not used in the whole manufacturing process, and the method is more environment-friendly.

Description

technical field [0001] The invention relates to the field of anti-counterfeiting technology, in particular to an anti-counterfeiting method integrating embossing to produce dark lines, latent images and unlocking. Background technique [0002] At present, the demand for anti-counterfeiting of various products in the market is becoming more and more extensive, especially the anti-counterfeiting technology requirements for cigarette pack products are getting higher and higher. Anti-counterfeiting patterns mainly include three methods: dark pattern, latent image, and unlocking. Most of the existing technologies use gravure printing to make anti-counterfeiting patterns. It has a great impact on the engraving accuracy. This kind of products cannot be very fine. The most fine level of printed matter is generally 100 lines / cm; (2) The printed pattern is 2D flat and has no 3D stereoscopic effect. Latent image (that is, the 3D shape of dots reflects light at different angles to hide...

AI Technical Summary

Problems solved by technology

Anti-counterfeiting patterns mainly include three methods: dark pattern, latent image, and unlocking. Most of the existing technologies use gravure printing to make anti-counterfeiting patterns. It has a great impact on the engraving accuracy. This kind of products cannot be very fine. The most fine level of printed matter is generally 100 lines / cm; (2) The printed pattern is 2D flat and has no 3D stereoscopic effect. Latent image (that is, the 3D shape of dots reflects light at different angles to hide text or patterns in the shading, and the hidden patterns can only be seen through a certain angle) has poor anti-counterfeiting effect; (3) gravure printing production Unlocking anti-counterfeiting patterns (that is, using dots or lines as the basic unit to form and express various printing patterns) cannot be better hidden, because the way to unlock is to slightly offset the position of the text or pattern that needs to be hidden, while printing The difficulty lies in the amount of offset. If the amount of offset is small, the ink will spread after printing, so that the hidden pattern cannot be seen with the unlocking sheet after printing the product, or the hidden pattern cannot be seen clearly, so it cannot be used. Anti-counterfeiting effect; if the offset is too large, you don’t need to use the unlocking sheet, and the hidden content can be seen with the naked eye, so the purpose of unlocking and anti-counterfeiting will not be achieved

Images