Due diligence in court. Many attorneys are aware that forensic document examiners can determine the authenticity of a signature and perform various examinations on typewriters and printed documents. However, many attorneys do not know that additions, alterations or rewriting can also be detected - by a forensic chemist. A forensic chemist is able to do more than a forensic document examiner.
Ink dating The dating of inks is done in three primary forms.
First is the chemical date tag. Approximately one-third of all inks manufactured in North America contain a cumerin compound that is unique for its year of manufacture. This was done from the late 1960s until 1994. Also, the first date of production can be established by determining the type and manufacture of the ink. The second form of ink dating is the evaporation of volatile solvents and decay of bands on a chromatogram, This is the technique used to date inks to within six months until they are approximately three to four years old.