Dating paper documents fenisay dating
This specialized investigative process extracts historical and physical evidence from documents, photographs, art prints, books, and other paper-based objects.Investigators have a number of analytical tools at their disposal, ranging from standard optical magnification, to exquisitely sophisticated molecular spectroscopy.Purpose To find scientific evidence of paper age and origin.
Each document was produced at different moments using a different ink stroke pressure, factors that may alter the results and lead to dating errors.
In other words, when applying this analysis procedure, the team can indicate whether the document was written 1,500 days previously (just over four years) with a margin of 300 days either way.
Until now, the passing of time was detected only in a very general way, in other words, it was possible to determine whether the document was young (whether it was less than 90 days old) or old (more than 2 years).
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.
So the team used the same procedure as that used to analyse the samples produced for the research. This technique managed to spot the age of the ink on documents written up to five years previously and with an approximation margin of about 20%.