7/23/2023 0 Comments Excentro guillocheA 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. EXCENTRO FOR PC PCĮven 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. It is even more difficult to forge a guilloche composition obtained by the Oryol printing method. 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. Each colorful pattern transfers the colorful image to the pivot shaft and then to the assembly mold with the pattern of the entire original. This allows for a single sheet pass through the printing machine to print without any shifts or gaps multi-color pattern. 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. The fake line will be either continuous but monochrome, or changing color, but broken, consisting of halftone dots. This method of protecting printed products from counterfeiting, like guilloche, has been a success for more than a century. In Russia, guilloche elements began to be printed on banknotes and other securities under Alexander II. In the 19th century, guilloche was created on special mechanical guilloche machines. For a long time of its existence, guilloche technology has been constantly improved. The methods for creating guilloche elements became ever simpler, while the level of complexity of compositions from these elements increased. Now all guilloche elements are modeled by special computer programs, and printed either by offset or multi-color Oryol printing. Undoubtedly, guilloche is an effective way to protect documents, etc. 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.
0 Comments
Leave a Reply. |