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  • 12.02.2019
  • by Momuro

Forensic science of dating inks fine tuned -- ScienceDaily

Ink Master Is Fake And This Is Why

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.

It should be noted that sequence of execution may be determined even when lines of the text and signature handwritten notation do not intersect. For example, a forensic document examiner can determine whether the stray toner particles they are present on any laser-printed and photocopied documents but invisible to the naked eye are below or above ballpoint pen ink writing see Aginsky, V.

Skip to main content. Ink Dating There are four major approaches each approach is a group of methods used for dating inks on documents: 1. Ink Aging Approach Various methods have been published to measure aging processes that occur in ink on documents. Ink Availability Approach The second ink dating approach analyzes the chemical composition of inks on a contested document with the aim to determine whether these inks as well as other materials used to produce the document — paper, inkjet printing ink, toner, stamp pad ink, etc.

Ink Comparison Approach 3.

Comparison of the contested document to other similar documents from the same time frame — If other similar documents from the same source and pertinent time frame are available for comparison with the contested document, then: The presence of the same printing defects on the contested document and comparison documents or the same patterns of trash marks or incidental marks on photocopies or laser prints may yield valuable information concerning the dating of the contested document.

The physical optical and chemical examinations of writing inks, as well as other materials used in the production of documents paper, inkjet printing ink, toner, typewriter ribbon ink, carbon paper ink, stamp pad ink, etc. Ink analysis and dating can also be conducted on machine printed document such as inkjet ink and toner from photocopiers, laser printers, and facsimile machines.

Forensic Paper Examination. Gerald M. LaPorte, M. He trained with and served as the Chief Research Forensic Chemist with the United States Secret Service and was responsible for maintaining the largest known forensic collection of writing inks in the world. LaPorte is an active member in numerous forensic organizations and has provided expert testimony in international, federal, and state courts.

Ink dating accuracy

Forensic Ink Dating. Cantu, A sketch of analytical methods for document dating. Part I. The static — Cantu, A Sketch of analytical methods for document dating. Part II. The Revue Internationale de [4] C. Weyermann, Dating a document, in: M.

In fact, the dating of documents is a key area in the field of forensic So Datink offers a more accurate, less damaging, less intrusive and less.

Jamieson Ed. Forensic Sciences, vol. Weyermann, B. Schiffer, P. Margot, A logical framework to ballpoint ink dating [5] M. Weyermann, D.

Kirsch, C. Costa-Vera, B. Spengler, Photofading of ballpoint dyes [6] J. Graydon, B.

The accuracy with which you can determine when a hand written With time, it tends to disperse and spread on the paper if its ink or pencil. you can trace the date fairly accurately as to when the document was written. 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. Two main approaches can be used for determining the age of an ink: indirect dating and direct dating. Indirect dating is based on the chemical analysis of an ink.

Spengler, Evaluation of the photo- [7] J. Stephens, R. Andrasko, M.

Forensic science of dating inks fine tuned

Kunicki, Inhomogeneity and aging of ballpoint pen inks inside pf [41] C. Weyermann, W. Mazzella, P.

U, Geyer-Lippmann J. J [9] D. Grim, J. Siegel, J. Allison, Does ink age inside of a pen cartridge? Forensic Sciences 47 6 — Kikuchi, Estimation of the age of the writing in blue black ink IJapanese Police natural aging processes of ballpoint ink, Forensic Science International Science Laboratory Report 12 3 — Cantu, R. Prough, On the relative aging of ink—the solvent extraction [44] L.

Stewart, Ballpoint ink age determination by volatile component comparison— technique, Journal of Forensic Sciences 32 5 — Brunelle, C. Breedlove, C. Midkiff, Determining the relative age of ball- CO, Brunelle, K.

Ezcurra, I. Velasco, J. Maguregui, R. Thomas Publisher, Ltd.

It is known that the artificial and natural aging of writing inks printed on paper is an . a detailed characterization of all such overlaps and also accurately names placed on known types of paper at a known date and stored at. Dr. Aginsky is the author of two ink aging methods that analyze ink volatile To date, the SET is the only ink aging method that has shown its reliability through. The second form of ink dating is the evaporation of volatile solvents and decay of the due components, the date of authorship can be accurately determined.

Brunelle, H. Lee, Determining the relative age of ballpoint ink using a single- Document Examiners 12 2 57— Gaudreau, L. Journal of Forensic Sciences 38 5 — Lociciro, W.

?Battle Of The Fittest? Error & Ink - SPEEDPAINT

Mazzella, L. Dujourdy, E.

Can we find the absolute age of a document?

Lock, P. Margot, Dynamic of the ageing of [18] V. Aginsky, A microspectrophotometric method for dating ballpoint inks—a [51] C. Stewart, S. Guertin, Current status of ink age determination, in: Interpol — Aginsky, Dating and characterizing writing, stamp, pad and jet printer inks by tional Criminal Police Review, Andrasko, Some examples of applications of a microthermal desorption — Kikuchi, Studies on the age of iron—gallotannate ink writing II the chromatic — Brazeau, M. Gaudreau, Ballpoint pen inks: the quantitative analysis of ink [23] Y.

Sen, P. Gosh, Dating iron-based ink writings on documents, Journal of [55] J. Buchner, A. Dallmayer, Age determination of ballpoint ink by Forensic Sciences 16 4 — Brunelle, E. Speckin, Technical report with case studies on the accelerated Ed. Dallmayer, Age determination of ballpoint pen ink by Document Examiners 4 3 — Brunelle, A.

Cantu, A critical evaluation of current ink dating techniques, Forensic Sciences 53 4 — Journal of Forensic Sciences 32 6 — LaPorte, J.

Wilson, C. Mancke, S. Lyter, Relative aging of ball pen ink: natural aging vs. Berger-Karin, U. Hendriks, J. Hicks Champod, A. Khanmy, P. Margot, Ink aging: perspectives on standardi- — Jacob, W. Huckenbeck, P. Pieper Eds.

Koester, Berlin,[60] J. Dallmayer, Characterization of ballpoint pen inks by pp. Document Examiners 1 1 3—5. Margot, T.

The 'spread' of ink into the paper fibers could also be used to infer the date the on the accuracy of the estimated date required to make that date legally viable. These questions should be carefully studied for accurate and ethical application of this methodology in casework. Inspired by a real investigation involving ink. Ink dating is a highly specialized forensic examination and considered to be one of the most accurate and reliable methods to help determine the age of a.

Fortunato, Distinguishing between relative ink age determina- [62] M. Ezcurra, J. Alonso, Evaluation of loss of tions and the accelerated aging technique, International Journal of Forensic phenoxyethanol from a ballpoint pen ink over time by GC—MS depending on Document Examiners 2 1 10— Aginsky, Accelerated aging—its use in methods for dating ink, International Questioned Document Examiners 13 1 9— Journal of Forensic Document Examiners 2 3 —


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