Journal Published Online: 01 September 2001
Volume 46, Issue 5

Systematic Analysis of Bulk Blue Ballpoint Pen Ink by FTIR Spectrometry



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.

Author Information

Wang, J
Tsinghua University, Beijing, P.R. China
Luo, G
Tsinghua University, Beijing, P.R. China
Sun, S
Tsinghua University, Beijing, P.R. China
Wang, Z
Institute of Forensic Science People's Republic of China, Beijing, P.R. China
Wang, Y
Criminal Police College of China, Shengyang, P.R. China
Pages: 5
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Stock #: JFS15104J
ISSN: 0022-1198
DOI: 10.1520/JFS15104J