Questioned Documents: Instruments used in document analysis: ESDA and VSC

In addition to various types of microscopes like magnifying lens, compound microscope, stereo microscope and comparison microscope that are being used for the analysis of questioned documents. Some instruments such as Electrostatic Detection Apparatus (ESDA) and Video Spectral Comparator (VSC) are also used for the analysis of the documents that are in question. These instruments are only meant for document analysis. ESDA is a forensic device used to detect indented writings in paper. VSC combines sophisticated digital imaging and multi-wavelength LED technology with a clear and efficient software interface, to provide a complete solution to the examination of all questioned documents.

Let us all learn about ESDA and VSC in the given video lecture.