Analysis and examination of questioned documents like passports, banknotes, security paper, etc., in the visual and infrared range as well as short and long UV. The integrated colour spectroscopy module permits spectral comparison investigations. The intelligent software package PIA-7000 supports the user in document comparison, writing of reports, buiding up of a data base and includes measuring possibilities for dimensional scale determination. Illustration of spectral curves in L*a*b* and CIE colours.