Ink dating cross cross examination
To do this, they used BIC® ballpoint pens, one of the most common makes and, therefore, the most widely used in documents subjected to legal examination. The first ink dating method is the static approach, which determines when the ink being examined was manufactured.If an entry is dated in 1995, but the ink was not available until 2005 then the document could not have been created in 1995. Inks contain chemical solvents that evaporate and generally go through a drying process that can last up to 2 years.
The chemical analysis of writing and printing inks, as well as paper, can be invaluable when trying to prove whether a document is fraudulent.Several different tests exist in this form of ink dating.These ink dating methods include the comparison of the examined ink to a known library of standards, commonly called the library approach, the detection of chemical date tags placed in the ink purposefully by the manufacturer, commonly called the date tag method, and also the determination of the type of ink writing instrument used.Different techniques have been used, based on the study of chemical and physical properties of various types of inks. Not all published methods are reliable, however, and some have been heavily criticized (Hofer, 2004).