NCJ Number
86283
Journal
International Criminal Police Review Issue: 357 Dated: (April 1982) Pages: 94-110
Date Published
1982
Length
17 pages
Annotation
Several fairly rapid methods for identifying complex films and analyzing their constituents and additives are listed for treated papers and 16 plastics.
Abstract
Methods for separating constituents by attacking the bonding agents are given for papers treated with urea, formaldehyde, malamine, etc.; glyoxal; formaldehyde; sodium pentacholorophenate; sorbic acid; silicones; chromium chloride stearate; dicyclohexyl-ammonium nitrate (VIP 260); and papers containing optical bleaching agents. Research methods are also suggested for identifying plastics if infrared spectrometry equipment is unavailable. The plastics covered are cellulose acetate, propionate, acetate butyrate, and films; rubber hydrochloride, polyvinyl acetate and alcohol, polycarbonate, polyethylene, and more. Suggestions are also included for quantifying polymers, monomers, additives, and auxiliary substances. Tables list characteristics of several materials, as well as methods for separating several bonding agents and adhesives, emulsions or protective varnishes, and materials. Charts illustrate the infrared spectra of selected films and additives. Ten references are provided.