Study of interpretation of the detection phenomena and application methods of an electrostatic detection device
Ken Onodera · Japanese Journal of Forensic Science and Technology · 2024
An electrostatic detection device (EDD) is a device that uses electrostatic charge to detect invisible indented writing impressions left on a paper surface. In this study, the following four types of experiments for the phenomena of the EDD detection and the possible applications other than detecting the indented writing impressions were conducted and discussed. First, the EDD detections were examined with various color materials on a paper: marker ink, whiteboard marker ink, vermillion inkpad ink, and inkjet printer ink. Second, visualization of the characters without indentations was attempted by EDD. Third, the EDD detections were examined with sweat, oils and fats. Fourth, visualization of obliterated and tampered characters or patterns of documents was attempted by EDD.