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Intertek offers inks chemical and physical testing analysis techniques, providing customer research, quality and problem solving support.
Our laboratory and related activities for ink include testing, failure analysis, consulting and regulatory expertise.
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.
More accurate, less invasive After observing this natural evolution and once the base guideline had been established, the next challenge to be overcome was to check the viability of the method using spontaneously written documents whose exact age was known, such as diaries, laboratory logs and judicial evidence from judicial processes that had been closed.
Nevertheless, this methodology is a pilot experience that requires further in-depth research when it comes to evaluating the limits of the applicability of the various inks and makes of ballpoint pens, thus reducing its potential limitations. Historical research using forensic fingerprinting techniques on the wax seals of thousands of medieval documents will reveal new insights into 12th to 14th century British society, help determine how ...
As Luis Bartolomé pointed out, "what is interesting about this method is that it can more accurately determine the age of the stroke produced by the ballpoint pen.
A classic example is where a zero is added to a cheque making the value ten times as much.Our examiners use an instrument known as a VSC 2000HR to carry out non-destructive specialised lighting examinations.Inks may also be distinguished by other more complex chemical tests but these are likely to be destructive to some extent.Specifically, they focussed on the solvent known as 2-phenoxyethanol (PE), present in 80% of the inks in ballpoint pens of this type.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.
Aware of these difficulties, the UPV/EHU team began to work on samples written for research purposes.