ISSN: 0022-1198
CODEN: JFSCA
Page Count: 5

Systematic Analysis of Bulk Blue Ballpoint Pen Ink by FTIR Spectrometry
Luo, G
Professor, Tsinghua University,

Wang, J
Tsinghua University,

Sun, S
Professor, Tsinghua University,

Wang, Y
Professor, Criminal Police College of China,

Wang, Z
Institute of Forensic Science People's Republic of China,

(Received 30 November 1999; accepted 18 October 2000)

Abstract

A classifying method on bulk blue ballpoint pen ink has been studied by Fourier transform infrared (FTIR) spectroscopy. By using this method, a total of 108 blue ink samples have been divided into two groups depending on their main component. Spectral characteristics of these inks such as frequency and absorbance are described by way of artificial intelligence of pattern recognition, and 35 subgroups from the 108 inks are distinguished by their correlation coefficient (λ). Under heat or exposure to ultraviolet light a mode of change in the age of the inks has been obtained. This approach has provided a reliable and nondestructive method for the characterization of bulk ballpoint writing ink, and more importantly, it might be a basis for dating of the blue ballpoint pen ink.

Keywords:
forensic science, ballpoint writing inks, FTIR spectrometry, nondestructive analysis, artificial intelligence, pattern recognition

Paper ID: JFS15104J
DOI: 10.1520/JFS15104J
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