Dating ink on paper
In order to do this the following steps are taken: Ink dating – chemical tag: The detection of a chemical date tag can disclose the exact year that the ink being examined was manufactured.Other times the results will disclose a range of a few years as possibilities the ink could have been made.
This is another place where a large body of knowledge of running inks is significant, to evaluate differences that are attributable to differences in batches of inks and differences that lead to the conclusion of different formulations.
The ink library approach, as it is commonly referred to, comprises the other portion of the static approach to ink age determination.
This involves the comparison of the questioned ink being examined to a known library of inks to determine the manufacturer and formula of the ink.
The idea of getting manufacturer’s voluntary cooperation to incorporate these tags with their existing formulations was developed in the late 1960’s at the Bureau of Alcohol, Tobacco, and Firearms.
This was to further the identification of inks using the standard ink library approach. In 1969, Formulabs of Escondido, California inserted the first type of date tag in their ballpoint inks.