Application of judgment with ATR FTIR in differentiation of forgery document
- Application of judgment with ATR FTIR in differentiation of forgery document
- 남윤식; 이강봉
- forensic science; ball point pen; ATR-FTIR; questioned document
- Issue Date
- Ballpoint pen ink signatures on questioned documents were studied to investigate the feasibility of micro-Attenuated Total Reflectance (ATR) FTIR spectroscopy as a tool in the forensic study. Micro-ATR FTIR spectra for signatures written with 63 ballpoint pens available commercially in Korea were collected. The technique was able to differentiate black ballpoint pen inks of different models or manufacturers. Blind testing for the ballpoint pen signatures has shown that micro-ATR FTIR can identify the origin of ballpoint pen ink used for signature with accuracy. Data gathered were converted to a spectral database for future reference or library. Also, the technique was also successful in determining the sequence of homogeneous line intersection from line crossing of two ballpoint pen signatures. The results show that micro-ATR FTIR can be a valuable non-destructive tool for the objective analysis of questioned documents involved ballpoint pen ink signature
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