(Received 14 May 1981; accepted 16 September 1981)
Published Online: April
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Most natural fibers are either cellulosic or proteinaceous and can be identified readily by unique morphological features. Synthetic fibers, on the other hand, vary only slightly in shape characteristics. They can, however, because of great compositional differences, be distinguished by their refractive indices, which can often be determined by dispersion staining. A simple scheme is proposed using this technique on fibers mounted in Cargille high-dispersion liquid (index of refraction for 25¼ and sodium light equal to 1.525).
Criminalist, Laboratory of Criminalistics, Santa Clara County, San Jose, CA
Stock #: JFS11480J