The applicability of FT-IR microsampling techniques to the nondestructive analysis of ballpoint pen inks on questioned documents is discussed. Preliminary spectral results using conventional transmission FT-IR, micro-transmission/reflectance FT-IR, and diffuse reflectance infrared fourier transform (DRIFT) spectroscopy are presented. DRIFT spectroscopy may offer a viable, nondestructive method for the analysis of ballpoint pen inks on questioned documents.
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Joel M. Harris (1991) studied this question.
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