Ink dating brunelle
A method and ink composition are disclosed that utilize two mechanisms for the purpose of indicating the approximate age of an ink that has been deposited on a writing surface.
The first mechanism relates to detecting color shifts of p H sensitive compounds in the ink as the result of the evaporation...
A first embodiment of the present invention relates to the detection of p H shifts of chemical compounds in the ink.
The elapsed time is then determined from predetermined calibrated time curves.The curves generated are ratio curves which plot the amount of reactant divided by the amount of product, versus time.The use of a ratio solves the problems associated with measuring raw characteristics.The present invention is particularly applicable to investigations that are intended to combat fraud, including medical fraud, insurance fraud, and fraud involving other time dated documents such as wills, trusts, deeds and legal agreements. Background Art The aging of ink is an important factor in the forensic examination of documents. Reed, entitled Forensic Examination of Ink and Paper, which is published by C. In fact, no conventional ink is known having a composition which lends itself to an accurate time dating method.The ability to accurately time date writings and signatures deposited on a document, or set of documents, can help determine the authenticity of the document or documents and detect fraud, such as, for example, where a document contains several time dated entries which indicate a long span of time, but the writer falsified the document by making the entries all at one time or at a fewer number of sittings than indicated by the dates written on the document. One of the most common techniques of falsifying documents and perpetrating document fraud is the act of entering multiple time dated entries at one sitting, rather than at successive times.