Forensics age dating ink

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. Itxaso San Román, Luis Bartolomé and Rosa María Alonso allowed the chemical compound to age under normal conditions, without ageing it artificially, which is what happens in other methods, and studied its evaporation speed.When analysing the kinetics involved in its disappearance, the research group established a pattern that links the state of the ink with the time that has elapsed.

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Specifically, they focussed on the solvent known as 2-phenoxyethanol (PE), present in 80% of the inks in ballpoint pens of this type.So Datink has overcome some of the drawbacks graphology examination comes up against when ascertaining the age of a document by means of other methods.In these cases, significant dating errors occur because the type of paper used and the mass/quantity of the ink deposited influence the analysis.Or else it is a very useful tool to date contracts, settlements, wills or other documents. Its use could have for example helped to determine the moment when the papers in the Bárcenas [corruption claims] case were written." To conduct the research work, the Department of Analytical Chemistry had the collaboration of the company Investigaciones Forenses Documentales LEYAS and Magdalena Ezcurra holder of a Ph D from the UPV/EHU.

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