Other times the results will disclose a range of a few years as possibilities the ink could have been made.
The next step would be the most basic ink dating form of thin layer chromatography (TLC) testing to determine if two or more inks are the same or different formulations.
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.
Information on these tags is confidential and closely kept.
This type of examination is very rarely to never used in actual casework currently.
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.