Author:Avril

Charles S. Tumosa ABSTRACT: Historic battle flags and uniforms are collected by museums, and many have significance as icons representative of their owners as well as historic context. The effects of battle, both mechanical and chemical, have an impact on the projected lifetimes of these objects in museums website here. Modern air quality, as well …
Continue reading Speculation on the Effects of Gunshot or Explosive Residues on Historic Silk Flags

J. Edmund Hay Introduction: The U.S. Department of Transportation (DOT) requested the U.S. Bureau of Mines to conduct tests on explosive substances and articles in support of the involvement of both agencies with the United Nations (UN) Group of Experts on Explosives pursuant to the development of an international classification system for explosive substances and …
Continue reading Summary Report on Tests on Display Fireworks Conducted by the Bureau of Mines for the U.S. Department of Transportation Relative to Hazard Classification of Display Fireworks

Monona Rossol I recently read some information in the pyrotechnic literature[1] about chromium toxicity, which, unfortunately, was not completely correct. Since there are some serious health concerns regarding chromium, this brief article has been written to present a survey of some of what is known.[2–4] Chromium (Cr) is probably the most complicated of the metals …
Continue reading Brief Survey of Chromium Toxicity

Sebastian Hoerold and Andrew Ratcliff ABSTRACT: Red phosphorus has become an essential ingredient in the production of modern smoke and obscurant devices. Nearly all multispectral developmental projects are being based on the new versions of red phosphorus available from Clariant. In pyrotechnics and munitions, phosphine liberated by the traditional red phosphorusbased smoke compounds may diffuse …
Continue reading Commercial Developments in Red Phosphorus Performance and Stability for Pyrotechnics

K. L. & B. J. Kosanke and Richard C. Dujay ABSTRACT: Today the most reliable method for detecting gunshot residue is through the combined use of scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) of the resulting X-rays. In recent years, this same methodology has found increasing use in detecting and characterizing pyrotechnic reaction …
Continue reading Pyrotechnic Reaction Residue Particle Identification by SEM / EDS

Mary Fran. Desrochers, Gary W. Olsen, Chris Luchini, and M. Keith Hudson ABSTRACT: The development of the hybrid rocket motor has been plagued by combustion instabilities. These are usually monitored as fluctuations in chamber pressure and are on the order of tens of Hz in frequency. Previous work using our labscale hybrid system has also …
Continue reading Pressure, Plume Flicker, and Acoustic Data Correlation in Labscale Hybrid Rockets

Randall K. Norton ABSTRACT: For fireworks aerial shells, decreasing shellto- bore clearance and increasing mortar length appear to have the effect of increasing the predictability of fireworks aerial shell trajectories, and thus dud aerial shell impact points. Some geometrical considerations are given to the influence of mortar length and shell-to-bore clearance on apparent aerial shell …
Continue reading Fireworks Shell Drift due to Shell-to-Bore Clearance

M. A. Wilson and R. J. Hancox ABSTRACT: The technology associated with pyrotechnic delays, together with the many factors, both physical and chemical, that affect the performance of delay compositions and influence the design of delay elements have been outlined. The production of heat by thermite and thermate systems is similarly discussed. Keywords: pyrotechnics, gassy …
Continue reading Pyrotechnic Delays and Thermal Sources

Ernst-Christian Koch ABSTRACT: The obstacles to producing red colored pyrotechnic flames with lithium compounds are discussed. The principle emitter of red light in such flames is atomic lithium. Hydrogen and halogens in the flame gases are expected to have a substantial effect on the concentration of atomic lithium. The development of effective Libased red color …
Continue reading Evaluation of Lithium Compounds as Color Agents for Pyrotechnic Flames