Ink dating accuracy

The sample cm straight line, performed with ballpoint pen ink using a ruler. Again, the subject of alteration was abandoned by the plaintiff. The proximity of the sample that was thermally aged for 40 h to naturally aged samples may be due to two factors, and therefore explained by two hypotheses:. Aginsky, Determination of the age of ballpoint pen ink by gas and densitometric ballpoint pen inks: We can determine the first date of commercial availability of the ink used to prepare any handwritten or handprinted material.

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Ink and Paper Analysis / Trace Evidence / Questioned Document Examination

Based on these results, a general procedure for assessing the age of ballpoint pen inks on paper was developed. Click here to sign up. In a previous study, the authors demonstrated that thermal desorption of ink directly from paper, followed by chemical analysis using gas chromatography-mass spectrometry GC-MSis a promising procedure for characterizing ink-binder resins and solvents. An addition to a record must have at least one of the following criteria to be deemed significant in a case regarding the record tampering issue: Laurence Robert Simson, Jr. This statistical treatment provides a threshold value step would be to conduct independent validation studies at different for Q to decide if there is a trend in a series of points given a laboratories.

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