The Forensic Analysis of Thermal Transfer Printing PDF Download
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Author: GM. LaPorte
Publisher:
ISBN:
Category : Counterfeit documents
Languages : en
Pages : 9
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Book Description
Thermal transfer printing refers to printing processes that utilize heat to produce an image by either physical or chemical means or by a combination of both. As the technology has improved and the supplies have become less expensive, the use of thermal printing in the personal and business markets has increased significantly. Specifically, dye diffusion thermal transfer and thermal mass transfer have become predominant in the production of counterfeit credit cards, drivers' licenses, and other types of documents produced on plastic media. Chemical analysis by means of thin layer chromatography (TLC) has proven to be useful in characterizing various types of inks (e.g., writing and inkjet inks) In this study, the authors examined 81 different samples that included a total of 54 printer samples (43 photographic prints on paper and eleven plastic card samples) and 27 printer ribbons. A new TLC method was developed and tested utilizing a solvent system (80% n-hexane, 3% methyl ethyl ketone, and 17% ethyl acetate) that is capable of producing excellent resolution.
Author: GM. LaPorte
Publisher:
ISBN:
Category : Counterfeit documents
Languages : en
Pages : 9
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Book Description
Thermal transfer printing refers to printing processes that utilize heat to produce an image by either physical or chemical means or by a combination of both. As the technology has improved and the supplies have become less expensive, the use of thermal printing in the personal and business markets has increased significantly. Specifically, dye diffusion thermal transfer and thermal mass transfer have become predominant in the production of counterfeit credit cards, drivers' licenses, and other types of documents produced on plastic media. Chemical analysis by means of thin layer chromatography (TLC) has proven to be useful in characterizing various types of inks (e.g., writing and inkjet inks) In this study, the authors examined 81 different samples that included a total of 54 printer samples (43 photographic prints on paper and eleven plastic card samples) and 27 printer ribbons. A new TLC method was developed and tested utilizing a solvent system (80% n-hexane, 3% methyl ethyl ketone, and 17% ethyl acetate) that is capable of producing excellent resolution.
Author: Jane Lewis
Publisher: Elsevier
ISBN: 0124104193
Category : Law
Languages : en
Pages : 229
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Book Description
Forensic Document Examination enlightens forensic document examiners, forensic investigators, attorneys and others using the services of forensic document examiners with the basic principles and current trends in the area. Standards and methodologies apply now, which were non-existent 20 years ago. Instrumentation has moved beyond the microscope and the magnifying glass to digital cameras, digital microscopes, video spectral comparators, electrostatic detection devices for the development of indented writing on paper, scanners, and software programs like Write-On 2.0 and Photoshop. Covers basic principles and methodologies used in forensic document examination Contains state-of-the-art techniques and new trends Includes research over the last ten years and describes the future direction of forensic document examination
Author: Jack Cazes
Publisher: CRC Press
ISBN: 1439870675
Category : Science
Languages : en
Pages : 2968
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Book Description
Thoroughly revised and expanded, this third edition offers illustrative tables and figures to clarify technical points in the articles and provides a valuable, reader-friendly reference for all those who employ chromatographic methods for analysis of complex mixtures of substances. An authoritative source of information, this introductory guide to specific chromatographic techniques and theory discusses the relevant science and technology, offering key references for analyzing specific chemicals and applications in industry and focusing on emerging technologies and uses.
Author:
Publisher: Elsevier
ISBN: 0080554253
Category : Law
Languages : en
Pages : 1047
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Book Description
Forensic Science, Second Edition presents the applications of separation methods, manly chromatography, in forensic practice. The first part, devoted to forensic toxicology, contains reviews on forensic relevant groups of compounds, like: Opiate agonists, cocaine, amphetamines, hallucinogens, cannabinoids, sedatives and hypnotics, antidepressive and antipsychotic drugs, analgesics, antidiabetics, muscle relaxants, and mushroom toxins.In these parts, the preliminary immunochemical tests were also included, together with separation methods. Screening procedures used in forensic toxicology were presented in separate chapters on forensic screening with GC, GC-MS, HPLC, LC-MS, CE, and LC-ICP-MS. In the part on actual and emerging problems of forensic toxicology, following chapters were included: Analytical markers of alcohol abuse, toxicological aspects of herbal remedies, drugs and driving, analysis in alternative matrices, doping analysis, pharmacogenomics in forensic toxicology, and quality assurance. The second part presents application of separation methods in forensic chemistry, and comprises chapters on: Explosives, chemical warfare agents, arson analysis, and writing media. Third part on forensic identification contains chapter on forensic genetics.All chapters are written up-to-date and present specific information up to 2006. The authors of each chapter are known not only from their scientific activity, but are also reputed experts, proven in everyday forensic casework. Wide spectrum of topics presented Up-to-date presentation of topics Data are presented in comparative mode Special stress put on screening procedures
Author: Miriam Angel
Publisher: CRC Press
ISBN: 100024542X
Category : Law
Languages : en
Pages : 360
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Book Description
Forensic Document Examination in the 21st Century covers the latest technology and techniques providing a complete resource on contemporary issues and methods in forensic document examination. Forensic document examiners provide their findings as expert testimony in court. Due to rapid changes in technology, including digital documents, printing and photocopying capabilities, and more, there is a great need for this up-to-date reference. The examination of documents can include comparison of handwriting or hand-printing; detection of alterations or photocopier and computer manipulation; restoration or decipherment of erased and obliterated writing; visualization of latent impressions; the identification of printing processes; and differentiation of inks. Computer-generated documents are prevalent, and electronically-captured signatures are becoming more widespread, meaning the knowledge of advances in technology and adoption of new validated techniques and methods of document examination are crucial to the reliability of forensic opinions. Forensic Document Examination in the 21st Century includes the latest research on the subject and with contributions from leading experts on their various areas of expertise. The book will be a welcome addition to the literature and support the foundational basis for methods and procedures for use it expert testimony in court, serving as a resource for forensic document examiners, trainees, and those in the criminal and legal communities who use the services of expert document examiners and witnesses
Author: Martin C. Jürgens
Publisher: Getty Publications
ISBN: 0892369604
Category : Art
Languages : en
Pages : 330
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Book Description
Describes the major digital printing processes used by photographers and artists over the past forty years, explaining and illustrating materials and their deterioration, methods of identification, and options for acquiring and preserving digital prints. --from publisher description.
Author: Paul C. Giannelli
Publisher:
ISBN:
Category : Evidence (Law)
Languages : en
Pages : 1196
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Book Description
Author:
Publisher: John Wiley & Sons
ISBN: 0470018267
Category : Medical
Languages : en
Pages : 405
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Book Description
The Encyclopedia of Forensic Sciences provides a comprehensive, definitive, and up to date reference of the main areas of specialist and expert knowledge and skills used by those involved in all aspects of the forensic process, including, but not limited to forensic scientists, doctors, practicing and academic lawyers, para-legals, police, crime scene investigators, analytical chemists, toxicologists, etc. The Encyclopedia of Forensic Sciences covers all areas of specialist and expert knowledge and skill which, either as part of an established forensic discipline or as a potentially useful emerging discipline, are of interest to those involved in the forensic process. This includes both the scientific methodology and the admissibility of evidence. The encyclopedia also includes case studies of landmark cases in the definition and practice of forensic science. The Encyclopedia of Forensic Sciences presents all material on a level and in a style that makes it accessible to a wide range of readers. Lawyers will be able to understand the science behind scientific evidence, scientists will understand the legal aspects, physical scientists will have access to biological and social sciences aspects and vice versa.
Author: Jay A. Siegel
Publisher: John Wiley & Sons
ISBN: 1118897749
Category : Science
Languages : en
Pages : 564
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Book Description
Forensic Chemistry: Fundamentals and Applications presents a new approach to the study of applications of chemistry to forensic science. It is edited by one of the leading forensic scientists with each chapter written by international experts specializing in their respective fields, and presents the applications of chemistry, especially analytical chemistry, to various topics that make up the forensic scientists toolkit. This comprehensive, textbook includes in-depth coverage of the major topics in forensic chemistry including: illicit drugs, fibers, fire and explosive residues, soils, glass and paints, the chemistry of fingerprint recovery on porous surfaces, the chemistry of firearms analysis, as well as two chapters on the key tools of forensic science, microscopy and chemometrics. Each topic is explored at an advanced college level, with an emphasis, throughout the text, on the use of chemical tools in evidence analysis. Forensic Chemistry: Fundamentals and Applications is essential reading for advanced students of forensic science and analytical chemistry, as well as forensic science practitioners, researchers and faculty, and anyone who wants to learn about the fascinating subject of forensic chemistry in some depth. This book is published as part of the AAFS series 'Forensic Science in Focus'.
Author:
Publisher: Springer
ISBN: 9783642694059
Category : Science
Languages : en
Pages : 0
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Book Description
Thermal analysis methods have been introduced into forensic sciences only in recent times. Though thermoanalytical instruments have been available commercially for some decades it was not until the beginning of the seventies that forensic scientists became interested in them. At that time some state forensic science laboratories in the Federal Republic of Germany made use of differential thermal analysis for forensic soil investigations. The forensic science section of the city police of ZUrich, Switzerland, applied an instrument (differential thermal analysis and thermogravimetry) for various purposes. Investigations of fibers by means of differential scanning calorimetry were reported by the Centre of Forensic Sciences at Toronto, Canada, and on the characterization of candle-waxes by differential thermal analysis by the Metropolitan Police Forensic Science Laboratory, London, England. Later on some other insti tutions like the Bundeskriminalamt at Wiesbaden, Germany, or the Home Office Central Research Establishment at Aldermaston, England, purchased instruments for one or more of the following thermal analysis methods: differential thermal analysis or differential scanning calorimetry, thermogravimetry, and thermomechanical analysis. . But even now thermoanalytical instruments are not widespread in forensic science institutes and knowledge of their forensic potential seems to be limited. In the following chapters we will give a survey of the most important thermal analysis methods mentioned above, and on current forensic applications and/or fields of actual research efforts.
