New PDF release: Scientific Examination of Documents, Second edition (Taylor

Science

By David Ellen

ISBN-10: 0203483596

ISBN-13: 9780203483596

ISBN-10: 0748405801

ISBN-13: 9780748405800

Thoroughly revised and up to date to mirror the newest recommendations and technological advances, this moment version offers and transparent, concise review of contemporary forensic record exam. The medical tools utilized to clarify questions about even if a record is actual, whose writing is on it, and any changes to info on it are defined intimately. Handwriting, typewriting, inks, paper, and different elements which make up records are mentioned and methods regarding infrared radiation, ultraviolet radiation, electrostatic detection, and microscopical exam are defined. it really is a useful advisor for trainees and more matured rfile examiners.

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Additional info for Scientific Examination of Documents, Second edition (Taylor & Francis Forensic Science Series)

Example text

In trying to produce a careful and slowly made freehand copy such variations in pressure are difficult to reproduce. Because they arise from the speed of natural movement they cannot be produced when the hand is moving slowly and is consciously controlled to imitate an unfamiliar pattern. Instead, the slowly moving pen is maintained at a more constant pressure on the paper, and the written line is therefore more even in width and its end not ‘tapered’ but blunt. 35 The Scientific Examination of Documents Figure 5 On the right-hand side of the picture a genuine signature is shown.

Thick-nibbed fibre or felt tipped pens have little effect on the actions of the writer, but the examiner may find difficulty in establishing the pen movement from his examination of the writing. 28 Modification of Handwriting Writing position When writings are made in awkward positions such as standing with a pen in one hand and a notebook in the other the control of the pen is less than when writing is made in ideal conditions. Examples of this may occur when a registered or recorded delivery is signed for at the door at the request of the postman.

To trace a signature it is necessary that the shape of the model to be copied is placed in the right place on the appropriate document. This can be done in a number of ways. A piece of carbon paper can be placed on the document and the signature to be copied placed over it. Light pressure of a pen following the line of the signature will produce a ‘carbon’ impression on the lower document. This can in turn be overwritten with ink to produce a realistic simulation of the original. Another way is to place the original on the document where the copy is required and to trace heavily along the line of writing so that impressions are made on the paper below.

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Scientific Examination of Documents, Second edition (Taylor & Francis Forensic Science Series) by David Ellen


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