Near-Infrared (NIR) lighting, in support of determining the sequence of non-intersecting media on documents: Ballpoint Pen Ink and Laser Toner entries

Certifying the entry chronology of signatures or printed text on documents represents an important issue for the examination of forged documents. While in the case of intersecting signatures, numerous analysis techniques have been reported in the literature, much less is known about non-intersecting signatures, which also occur very often in practice.