![]() However, both the original manufacturer and the pirate can purchase a program for drawing guilloche elements, and it is rather difficult for a simple consumer to distinguish real guilloche from fake. Undoubtedly, guilloche is an effective way to protect documents, etc. Now all guilloche elements are modeled by special computer programs, and printed either by offset or multi-color Oryol printing. The methods for creating guilloche elements became ever simpler, while the level of complexity of compositions from these elements increased. For a long time of its existence, guilloche technology has been constantly improved. In the 19th century, guilloche was created on special mechanical guilloche machines. In Russia, guilloche elements began to be printed on banknotes and other securities under Alexander II. This method of protecting printed products from counterfeiting, like guilloche, has been a success for more than a century. The fake line will be either continuous but monochrome, or changing color, but broken, consisting of halftone dots. As a result, each line in the guilloche composition smoothly and arbitrarily changes its color, so that it is almost impossible to fake it with conventional printing methods. This allows for a single sheet pass through the printing machine to print without any shifts or gaps multi-color pattern. Each colorful pattern transfers the colorful image to the pivot shaft and then to the assembly mold with the pattern of the entire original. The fact is that with this method, printing is done from one printing plate with the help of intermediate colorful templates that have drawings for each color of the original. It is even more difficult to forge a guilloche composition obtained by the Oryol printing method. EXCENTRO FOR PC PCEven monochrome guilloche elements are difficult to scan, as they often contain repetitive periodic elements that require huge amounts of PC memory, which makes it difficult for the computer to work. A guilloche composition cannot be accurately reproduced using a scanner: literally microscopic thickness (from 40 to 70 microns) and the constantly changing curvature of each line create insurmountable obstacles in front of a drawing block with insufficient resolution to perform such operations. Guilloche provides a very high degree of protection for securities, in particular, it protects banknotes from counterfeiting. However, according to existing regulations, guilloche elements must occupy at least 70% of the entire area of the security, and most of this space must be covered with guilloche compositions consisting of multicolor elements. Guilloche can be both symmetrical and asymmetrical in its design and design, covering only part of the document or its entire area. Typically, guilloche elements are various kinds of protective nets, rosettes, borders, vignettes and corners. The guilloche element is also an intricate pattern of many thin lace lines intersecting many times, given by mathematical formulas. The protection of documents is ensured by complex compositions of various guilloche elements that cover the surfaces of protected documents. Guilloche, or protective mesh, or tangir, is a special technology for protecting banknotes, documents, securities and other types of printed products (tickets, excise stamps, etc.). Interesting trick with reflection patterns. ![]()
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