Identification of altered documents written in black gel ink is widely recognized as problematic,especially if both the original and alteredstrokes contain carbon.In this work,we used a black handwriting resistance me...Identification of altered documents written in black gel ink is widely recognized as problematic,especially if both the original and alteredstrokes contain carbon.In this work,we used a black handwriting resistance measurement instrument to measure the resistance values ofink strokes.Because black gel inks are made with different types of pigments,their resistance values could be used to differentiate betweendifferent pen models from the same brand and among brands.In this study,30 black gel inks were classified by their resistance values.In apair‑wise comparison analysis of the results,there were 435 possible pairs and 347(i.e.,79.8%of the total)of these were able to be effectivelydistinguished.This is a nondestructive,convenient,and effective method to identify altered documents.展开更多
基金This study was supported by the Program of the Major Research and Development Projects of Shandong Province(Grant No.2017GSF20110)This study was supported by the Program of the Major Research and Development Projects of Shandong Province(2017GSF20110)This article was accepted by the 3rd International Symposium on Sino Swiss Evidence Science(3rd ISSSES),held by China University of Political Science and Law.
文摘Identification of altered documents written in black gel ink is widely recognized as problematic,especially if both the original and alteredstrokes contain carbon.In this work,we used a black handwriting resistance measurement instrument to measure the resistance values ofink strokes.Because black gel inks are made with different types of pigments,their resistance values could be used to differentiate betweendifferent pen models from the same brand and among brands.In this study,30 black gel inks were classified by their resistance values.In apair‑wise comparison analysis of the results,there were 435 possible pairs and 347(i.e.,79.8%of the total)of these were able to be effectivelydistinguished.This is a nondestructive,convenient,and effective method to identify altered documents.
