Scratching the Surface of Paper Currency with FT-IR Microscopy
Spotting Counterfeit Currency with New Analytical Tools
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The need to determine the authenticity of documents is so widespread and important to commercial trade, border security and law enforcement groups that these investigations represent a distinct branch of Forensic Science. Questioned Document specialists use a wide array of analytical techniques to assist in their investigations ranging from first-line visual inspection tools to advanced chemical-specific analysis instrumentation.
Visible light microscopy techniques are well suited for characterizing the printing techniques of individual characters and to look for evidence of alteration. Imaging methods, often using various light sources and filter combinations, complement direct visual inspection to enhance comparison studies to genuine articles.