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[Inspection of writing-time and script by FTIR microscope]
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|August 27, 2003
Summary
Fourier Transform Infrared (FTIR) spectroscopy can differentiate ball-pen inks on various papers. FTIR analysis also distinguishes between fresh and aged ink, aiding in determining writing time.
Area of Science:
- Analytical Chemistry
- Forensic Science
Context:
- Ball-pen script analysis is crucial in forensic investigations.
- Distinguishing between different inks and their age is often required.
Purpose:
- To investigate the applicability of Fourier Transform Infrared (FTIR) spectroscopy for differentiating ball-pen scripts.
- To assess the potential of FTIR for determining the age of ink on paper.
Summary:
- FTIR microscopy and Attenuated Total Reflectance (ATR) objective were used to analyze the infrared (IR) spectra of various ball-pen scripts on different paper types.
- Spectra were compared immediately after writing and after a three-month aging period.
- Results indicate significant differences in IR spectra between different ball-pen inks and also between fresh and aged inks.
Impact:
- FTIR spectroscopy shows promise as a reliable method for script identification in forensic analysis.
- This technique can potentially assist in estimating the time of writing, providing valuable evidence.