V n aginsky dating and characterizing writing stamp pad android
In both cases, chemical methods can be used to obtain information about the age of a document by measuring age-dependent parameters of ink.The first widely used age-dependent parameter was the extent of chloride migration, mainly from fountain pen inks, into the sur- rounding paper (1).Both methods lead to an age-dependent parameter that changes as the ink ages.The method was found to be applicable to ballpoint ink with an age of up to 2 years at the most.A dating method is referred to as relative if the age of two or more entries is compared to each other.
He showed in an example that this ratio may change with time. (7) examined ink on paper by analyzing the liquid extract with gas chromatography–mass spectrometry (GC–MS).
KEYWORDS: forensic science, questioned documents, ink dating, age determination, ink, resin, gas chromatography–mass spectrometry, thermal desorption, volatiles, document examination Dating writing ink can be a challenge in the field of forensic doc- ument examination.
Several methods are available in order to esti- mate the age of a written entry on a questioned document.
Thermal analysis of ink on paper in two steps revealed that fresh ink releases a relative amount of solvent at a certain low temperature in a defined period of time, which decreases as the ink ages.
As a consequence, this relative amount of solvent released at a certain low temperature, and its decrease with time, can be used to estimate ink age.