An Examination of the Sequence of Intersecting Seal and Laser Printing Toner Line |
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Authors: | Biao Li M.Sc. Guoliang Ouyang M.Sc. |
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Affiliation: | Department of Document Examination, National Police University of China, Shenyang City, China |
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Abstract: | Examining the sequence of intersecting seal and laser printing line is a significant method of determining the authenticity and validity of documents. In this study, five brands of stamp pad inks, three types of inkpads and seven kinds of laser printers were used to make heterogeneous line intersections. Observation method of physical characteristics, scraping technique and fluorescence method was used to determine the sequence of intersecting lines. Distinguishing features were noted between the materials produced in both sequences. As the results obtained from the study were positive, these features might provide a scientific basis for accurately determining the sequence between laser printing line and inkpad (stamp pad ink) seal. |
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Keywords: | forensic science document examination sequence of intersecting lines inkpad seal stamp pad ink seal laser printing line |
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