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Forensic Fiber Analysis Standards Standards for forensic fiber analysis address a staple component of forensic inquiry, the investigation of fibers, fabrics, textiles, cordage, everything contained within them, and everything constructed out of them. Given the enormous range of variability within the field of potential fibers that have to be identified, as well as their combinations and the array of forensically interesting material that might be attached, the widespread use of standardized procedures brings order and dependability to forensic fiber analysis. Forensic fiber analysis standards address procedures such as microscopic examination, thin-layer chromatography, or infrared spectroscopy. In addition to procedures, these standards also contain definitions and terminology, included in order to improve consistency between laboratories.

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ASTM E2224-10

Standard Guide for Forensic Analysis of Fibers by Infrared Spectroscopy

1.1 Infrared (IR) spectrophotometery is a valuable method of fiber polymer identification and comparison in forensic examinations. The use of IR microscopes coupled with Fourier transform infrared (FT-IR) spectrometers has greatly simplified the IR analysis of single fibers, thus making the technique feasible for routine use in the forensic laboratory. 1.2 This guideline is intended to assist individuals and laboratories that conduct forensic fiber examinations and comparisons in the effective application of infrared spectroscopy to the analysis of fiber evidence. Although this guide is intended to be applied to the analysis of single fibers, many of its suggestions are applicable to the infrared analysis of small particles in general. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.


ASTM E2225-10

Standard Guide for Forensic Examination of Fabrics and Cordage

1.1 The intent of this guide is to assist individuals and laboratories conducting examinations of fabrics and cordage. It is not designed as a detailed methods description or protocol for the analysis and comparison of fabric and cordage evidence, but as a guide to an acceptable procedure to strengthen the usefulness of the analytical method. 1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.


ASTM E2227-13

Standard Guide for Forensic Examination of Non-Reactive Dyes in Textile Fibers by Thin-Layer Chromatography

1.1 Metameric coloration of fibers can be detected using UV/visible spectrophotometry. If spectrophotometry is restricted to the visible spectral range only, differences in dye components may remain undetected. One method of detecting additional components is to use thin-layer chromatography (TLC). TLC is an inexpensive, simple, well-documented technique that, under certain conditions, can be used to complement the use of visible spectroscopy in comparisons of fiber colorants. The principle of the method is that the dye components are separated by their differential migration caused by a mobile phase flowing through a porous, adsorptive medium. 1.2 This standard does not replace knowledge, skill, ability, experience, education, or training and should be used in conjunction with professional judgment. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


ASTM E2228-10

Standard Guide for Microscopic Examination of Textile Fibers

1.1 This section describes guidelines for microscopical examinations employed in forensic fiber characterization, identification, and comparison. Several types of light microscopes are used, including, stereobinocular, polarized light, comparison, fluorescence, and interference. In certain instances, the scanning electron microscope may yield additional information. Select which test(s) or techniques to use based upon the nature and extent of the fiber evidence. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.


ASTM D7612-10(2015)

Standard Practice for Categorizing Wood and Wood-Based Products According to Their Fiber Sources

1.1 This practice sets forth minimum criteria and evaluation requirements for products employing the use of different systems to trace wood fiber to sources operating under different forest management or forest certification systems. 1.2 The purpose of this practice is to provide wood products manufacturers, distributors, and retailers with a system to provide clear, objective information to communicate to consumers regarding product conformance to different wood fiber tracing systems within specific forest management or forest certification programs. It provides a structure that segregates the different types of labels and tracing systems in use among major forest certification standards and other voluntary and regulatory standards governing the production of forest products. 1.3 The category structure of this practice is derived from publicly available sources or based on the provisions of various forest management or forest certification standards. Documentation of compliance with specific category requirements is the responsibility of the user. The objective of this categorization is to provide a concise and easily communicated description based on grouping of significant practices. It is possible that this grouping will result in some consolidation of concepts and practices of individual programs. Details of these practices or categorization of products complying with more than one program are beyond the scope of this practice. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.