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Ink Dating—The State of the Art
One of the downsides of this however is that client expectations on what is possible in certain areas of forensic science often greatly exceed what can actually be done. Usually the enquiry involves a signature on a will or a commercial document. The signature itself may not be in dispute but the actual date of signing may be critical to the resolution of the matter. Often the client believes that the document can be easily analysed to give an exact date the ink was placed on the paper.
This testing has the disadvantage that the original document must be released to a laboratory, something that is problematic for many legal documents and potentially expensive for the client.
Forensic Ink Dating is the chemical analysis of inks to determine the age of the ink on paper, or the date of introduction of the ink used on a particular document.
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Ink Dating Expert Witnesses
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Pen inks and handwriting, ink dating errors occur because the ink analysis ink, ink followed by. Pdf advances in the age, printer and regulatory expertise.
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Ink dating….and the CSI effect
Ink Dating is done in two primary forms. The first ink dating method is the static approach, which determines when the ink being examined was manufactured. The second ink dating method is the dynamic approach, this method is to determine when the writing occurred, or in simple terms, how long the ink has been on the paper. The ink dating static approach is typically more useful as the difference between the date on the document and the present time increases.
Several different tests exist in this form of ink dating. These ink dating methods include the comparison of the examined ink to a known library of standards, commonly called the library approach, the detection of chemical date tags placed in the ink purposefully by the manufacturer, commonly called the date tag method, and also the determination of the type of ink writing instrument used.
Some older methods such as the migration of chloride and sulfate ions from the ink into the paper [9–12] can no longer be used, as most inks are now free of these.
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Ink and Paper Analysis / Trace Evidence / Questioned Document Examination
Yes, with certain limitations. We can determine the first date of commercial availability of the ink used to prepare any handwritten or handprinted material. The type of ink does not preclude this examination. If the initial date of commercial availability is more recent than the supposed date of the examined writing, then the document is not what it purports. We cannot, however, through this technique, determine the specific or even approximate date of preparation.
The use of the forensic examination and dating of inks on questioned documents has become common, and law enforcement agencies rely heavily on these.
To browse Academia. Skip to main content. Log In Sign Up. Download Free PDF. Minimum requirements for application of ink dating methods based on solvent analysis in casework Lancet, Minimum requirements for application of ink dating methods based on solvent analysis in casework. These methods follow the drying of solvents from ballpoint Received in revised form 21 January pen inks on paper and seem very promising. However, several questions arose over the last few years Accepted 25 January among questioned documents examiners regarding the transparency and reproducibility of the Available online 4 March proposed techniques.
These questions should be carefully studied for accurate and ethical application of this methodology in casework. Inspired by a real investigation involving ink dating, the present paper Keywords: discusses this particular issue throughout four main topics: aging processes, dating methods, validation Forensic sciences Questioned documents procedures and data interpretation.
Dating Ink – Forensic science of dating inks fine tuned
Continue to access RSC content when you are not at your institution. Follow our step-by-step guide. Sauzier curtin. This paper presents a study into the potential of visible spectroscopy with chemometrics as an approach to dating blue ball tip inks on paper documents.
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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.
But this technique is also able to overcome other stumbling blocks relating to the amount of ink deposited when writing and the type of paper used, as these variables hamper the dating of a document by means of traditional methods. What is more, the new technique reduces the number of punctures needed to analyse the writing on a document to just one.
Determining the age of a document to find out whether it is authentic is a task influenced by the type of paper on which it has been written, the pressure of the stroke -the amount of ink deposited when the writing was done- or even the technique used. Until now, document dating methods have been able to indicate whether the writing was relatively new less than 90 days or older over two years , yet this chronological accuracy is insufficient in certain cases, above all in judicial ones.
Each document was produced at different moments using a different ink stroke pressure, factors that may alter the results and lead to dating errors. During the natural ageing process of each sample, which had a known age, the research team analysed the evolution in the various volatile components. When analysing the kinetics involved in its disappearance, the research group established a pattern that links the state of the ink with the time that has elapsed.