Dr Takeo Shimizu ABSTRACT: These studies concern two important problems at present: one is how to select the component materials of a mixture not to cause degeneration, and another is to find a more effective method of magnesium coating than those at present. A firework mixture generally consists of several solid materials which are closely …
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The Surface Explosion of Pyrotechnic Mixtures
Dr Takeo Shimizu ABSTRACT: In the past we sometimes observed a fairly large burning star caused an explosion with a loud noise at the very moment when it fell onto the ground. The star did not explode totally, but only with the thin surface layer. The burning surface layer of the star may be very …
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The Effect of Hot Spots on Burning Surface and Its Application to Strobe Light Formation with Mixtures Which Contain No Ammonium Perchlorate
Dr Takeo Shimizu ABSTRACT: The objective of this work was to make clear the effect of hot spots or hot spot materials on burning pyrotechnic compositions and to find practicable strobe light compositions without ammonium perchlorate which is not always popular in the firework field, using the effect of hot spot materials. As the hot …
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An Example of Negative Explosives: Magnesium Sulfate/Magnesium Mixture
Dr Takeo Shimizu ABSTRACT: At the Eleventh International Pyrotechnics Seminar, 1986, in Vail, Colorado, I reported on a study of pyrotechnic mixtures with a theme, “A Concept and the Use of Negative Explosives”. A further study has been continued on the same subject as before. In the former report it was known that magnesium sulfate/magnesium …
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Ballistics of Firework Shells
Dr Takeo Shimizu ABSTRACT: Heretofore we have had four important problems with calculations in this field, i.e., with the interior ballistics when using Black Powder as the propellant: (1) to obtain a suitable form function of the propellant which consists of irregular grains, (2) to obtain solutions when the burning rate ofthe propellant grains is …
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A Concept and the Use of Negative Explosives
Dr Takeo Shimizu ABSTRACT: In general, a pyrotechnic composition consists of an oxygen donor such as KNO3, KClO3, or KClO4, etc., an oxygen donee such as organic resin and some other inert substances. When substances, CaCO3, Al2O3, SiO or CaSO4, etc. are contained in it, they are regarded as an inert substance, because they are …
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Hypothesis on the Cause of Serious Accidents Related to Salutes Charges
Dr Takeo Shimizu Abstract: First, we hypothesize that a serious accident related to the use of salutes may be caused by the simultaneous explosion of several salutes or salute components, resulting in an unexpected, abnormally strong shock wave. To prove our theory, we conducted three experiments. In Experiment 1, we examined the transfer of the …
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Glitter Chemistry
Clive Jennings-White ABSTRACT: Pyrotechnic glitter is characterized by a liquid spark terminating in a delayed flash. The chemical mechanisms responsible for the delay and the flash are not known with certitude. Several pyrotechnists have proposed hypothetical mechanisms to account for the phenomena. The different proposals engender different predictions regarding how a glitter performs as a …
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To get the most from the archive we hope the following hints are useful Enter J23 to see contents and all articles published in JPyro Issue 23 or SH1 to see articles in the Selected Pyrotechnic Publications of Dr Takeo Shimizu, part 1 If you know the page and issue of an article enter, for example, …
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Review of: Incendiary Art: The Representation of Fireworks in Early Modern Europe – Kevin Salatino
Incendiary Art: The Representation of Fireworks in Early Modern Europe Kevin Salatino Review by Jim Malek This is a richly documented paperback book, one of the series called Bibliographies & Dossiers from the Getty Research Institute for the History of Art and the Humanities, documenting an exhibit held at the Institute in 1999. It contains …
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