DETECTING ALTERATIONS IN DOCUMENTS USING
A VIDEO SPECTRAL COMPARATOR (VSC)
Ink DifferentiationAreas other than handwriting and hand printing identification are also considered in the examination of questioned documents. Ink differentiation is used to detect alterations, erasures, and material changes in documents. The physical and chemical properties of two different inks will cause differing results when examined using the alternative light sources and filtering techniques available with the VSC.
Revealing Masked Information
Detection of Overwriting’s
DECIPHERMENT OF INTENDED WRITINGS USING OBLIQUE LIGHT AND ESDA
Oblique light photography
Using Electrostatic Detection Apparatus (ESDA)
Document Examiners at Forensicwriting & Questionedocument Services utilize the Electrostatic Detection apparatus techniques to decipher the intended writings.