One of the most frequently asked questions is “How much lift powder do I need for my shell?”. Unfortunately, the answer is not an easy one. The first reason is a lack of consensus regarding the optimum height to which various sized shells should be propelled. Of course, it is a requirement that burning components …
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Month:May 2007
The Use of Titanium in Pyrotechnics
Titanium is a very effective generator of white (silver) sparks when used in the manufacture of fireworks. This is because of three of its properties: it ignites easily and burns readily in air, it has a high boiling point, and it is corrosion resistant. Because of this unique combination of desirable properties, the use of …
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Further information about HDPE Mortars
Someone recently raised the question as to whether there could be potential problems with high density polyethylene (HDPE) mortars from contact with detergents and from exposure to sunlight. This article was drafted in response to a request to address those concerns and also to present an update on the status of acceptance of HDPE mortars …
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Pyrotechnic Spark Generation
The intentional production of sparks in fireworks contributes significantly to the beauty and spectacle of displays. However, in comparison to the time and effort devoted to generating improved color formulations, relatively little attention has been directed toward the possibilities for new and improved spark generation. This article is offered in the hope that a review …
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Determination of Aerial Shell Burst Altitudes
One type of fireworks data generally only guessed at is the altitudes of aerial shells at the time of their burst. In addition to addressing general curiosity, this data is often necessary when designing major aerial displays. Frequently it is important to know fairly accurately at what altitudes the various shells will appear. The rule-of-thumb, …
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Reduction of Shell Ignition Failures
A shell ignition failure means there will be a live dud in the fallout area after a display. If that dud is not retrieved, is found by a member of the public, and that person is subsequently injured as the result of mishandling the dud shell, an insurance claim against the shooter and manufacturer will …
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CMC – Its Properties and Uses
CMC, as it is commonly called, is more properly referred to as Sodium Carboxymethylcellulose (carboxy-methyl-cellulose). In the food industry it is also frequently referred to as cellulose gum. Ref: Selected Pyrotechnic Publication of K.L. and B.J Kosanke, Part 1, (1981-1989), pp 106-106 (K1_106)
Japanese Shell Break Radii
(Derived from data provided by Dr. T. Shimizu, private communication) The National Fire Protection Association, Technical Committee on Pyrotechnics is in the process of revising NFPA-1123, Code for the Outdoor Display of Fireworks (formerly called Public Display of Fireworks). In preparation for considering the appropriate separation distances between spectators and mortar placements and between spectators …
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Understanding Product Liability (Parts I and II)
During the past couple years, in the course of assisting attorneys as an expert witness, I have come to learn a little about product liability. Because this subject is so important to our industry and because product liability laws are not well understood by many of us, I have decided to share with you what …
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Destructive Testing & Field Experience with HDPE Mortars
In an earlier article on High Density Polyethylene (HDPE) mortars, results from an initial series of tests were published (Pyrotechnics Guild Int’l. Bulletin, No. 54, p 5). Those results will not be repeated here. This article continues by presenting the results from an additional test, a summary of the author’s field experience since the first …
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