Experimental Study On Identification Of Highly-forged Laser Carving Seal And Print

This paper aimed at the research of improving the ability of highly-forged laser engraving seal identification.The main research methods included making highly-forged experimental seals based on the known highly-forged ways,and then using the obtained experimental seals to mutative conditions of the stamping process.Experiments were carried out to find out the changes in the printed features of the stamps.Combined with the three processes of " print design,laser carving,seal stamping",the system summarizes two kinds of highly-forged seals such as measurement imitation seal and scanning imitation seal,and the"same version" illegal seal.The difference in seals,as well as different stamping conditions,cause changes and reflections in the characteristics of the print,what enrich the theoretical basis of the same identification of highly-forged seals and the judgment basis of identifying highly-forged seals in the identification caseThis paper is divided into five sectionsThe first part introduces the related issues of highly-forged seal printing by introducing t he legal seal making process and anti-counterfeiting technology.Under the background of the characteristics of Indian seals in the identification of seals and stamps,the differences in the structure of highly-forged seal and the sources of such differences are analyzed.Therefore,th e research direction of this experiment is pointed out,that is,the expression of the essential d ifference between the structure of the highly-forged seal,and the change of the stamping con ditions is reflected on the printed charactersThe second part is the main method of experimental research.The purpose of this experiment is to enrich the highly-forged seal seal identification theory and construct the specific understanding of the characteristics.The whole process of the experiment is divided into two stages.The first stage is the production of the highly-forged test seals,and the second stage is the selection of an experimental seal to study the change of the printed features under different stamping conditionsThe third part is the experimental results and analysis.The first pair of highly-forged exp eriment seals are examined and analyzed.Secondly,the stamps of the experimental seals are collected under the same stamping conditions?and the reflection of the characteristics of the r espective seals is examined.The third is to select an experimental seal as the research object,collect the seals under different stamping conditions on the stamping experiment platform;th e fourth is to analyze the influence factors of different stamping conditions on the characteristi cs of the stamps;the fifth one is in the previous step.On the result,the characteristics of the printed characters of the main influence conditions were explored.Finally,the experimental results are comprehensively analyzed,and the basis ofjudging the characteristic value of the printed characters is constructed,and a complete set of highly-forged seal printed feature reco gnition system is formed.The fourth part is the experimental conclusion.First of all,the highly-forged seal is the basis for identification.The structural shape of different seals is unique,and the stability and reflectivity of the features in the seal are high.Secondly,the changes of the stamp under different conditions can be traced.The diameter of the outer border of the stamp,the width of the border line,the shape of the lines of the text,and the changes of the central pattern are not obvious.The rest of the changes can be reproduced and explained in similar situation.In particular,the structural morphological features of coded numbers have better reflectivity in stamps,and their feature value is higher.Combining with the current authenticity identification methods of the seals and its stamps,the author summarizes some precautions and draws up the procedures and methods that can be used for the identification of highly-forged seals,which strengthens the understanding of the quality of highly-forged seals,and guarantees the scientific nature and objectivity of the opinions,The fifth part is the application in practice.Through a case study of a highly-forged seal,some misunderstandings in the highly-forged stamp identification and the interpretation of the essential attributes of the difference in the characteristics of the printed characters were found.According to the conclusion of the experiment,the case was reorganized and we have finally identified the printed materials.