It has been a problems for a long time for forensic scientists, customs officials and historians alike to be able to verify and authenticate printed documents just from the inks that have been used.
It is a difficult and often impossible task to analyse an ink in-situ on a paper surface and techniques such as GC-MS and HPLC are fundamentally destructive requiring complicated extraction procedures to isolate the ink constituents before analysis.
The technique of Raman Microscopy offers a non destructive mode of ink analysis which can directly identify and characterise specific inks found on the paper surface.
The following is a brief study of black inks commonly used in different desktop printers, and the identification of the source of a particular document.
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