Fire dust sparks

Silver Wave Stare which stream twinkling fire dust sparks. The sparks consist of not only silver, but also red, blue, yellow etc. 

Crown Willow(or Crown Chrysanthemum) A modified type of the chrysanthemum, the stars of which have a long burning time and fall with streams of fire dust sparks (Fig.2.A-). 

Titanium produces brilliant fire dust sparks having a relatively long life which cannot be obtained by other materials. 

V/hen we change the weight ratio of the three components, potassium nitrate, sulphur and charcoal, in steps, we have reddish fire dust sparks with correspondingly varied lives. Chrysanthemum 6 and 8 are of relatively short life and fit stars for the chrysanthemum(V/arimono). To obtain a pretty remaining fire, it is not enough merely to mix the three components, but the potassium nitrate must be allowed to soak into the... 

These hummer are loaded into a shell, and when ignited they fly around irregularly sending flame and fire dust sparks out of the hole with humming sound. 

Add as little water as possible to the composition and knead it well. Generally it is said that good kneading allows it to produce many long burning fire dust sparks, but this is not always true. This is charged... 

A pretty pattern of revolving fire is obtained by turning a simple wooden wheel on which some fire dust spark compositions etc. are fixed and burnt. For driving the wheel turning cases are used as shown in F5.g.l28. 

These items are also described in Lancaster s book on page 106, They are so named because the fire dust sparks drop to remind us of waterfalls. They are prepared as follows(Fig.129) Charge a waterfall composition which contains aluminium powder of relatively large flakes into strong paper tubes which have a thin wall which burns away. (See also 15.10.) Put a quantity of ignition composition in the end of each tube. Make holes in it from the outside and pass a piece of wire which is wound with a piece of powder pasted paper through the hole. Fix the waterfall units made in this way to a hemp rope at intervals of about 50 cm. Connect the igniting ends with a line of piped quick match. 

In general, flames, hot air, fire dust sparks, sparks or shock waves help the propagation of fire or explosion. Four of the former only promote the burning of the compositions by direct contact, but the latter causes a detonation, even when the composition is fairly distant from the source. However in toy fireworks the item which produces a shock wave is limited to crackers. It is necessary therefore to draw a clear line between crackers and other items when handling toy fireworks. 

Compositions must be well covered by other material in order to protect them against flames, fire dust sparks or general kinds of sparks. In practice, the composition is wound with paper tape, twisted in pieces of paper tapo or charged in small amounts into paper tubes. This plays an important role for the division and isolation of the composition. Some items like sparklers or Senk-Hanabi have exposed compositions with no cover but these compositions are quite insensitive to shock and friction and need no cover. Nevertheless they must be packed in groups with a small number in each pack. 

In general many compositions resemble the ones used for shells i.e. the ones for flames, fire dust sparks, fire branching sparks, noise, smokes etc. These phenomena however are seen close at hand and so the compositions are somewhat different from those for shells. 

B Fire dust sparks H Yellow smoke of realgar... 

The exhibition fireworks produce a large quantity of fire dust sparks as described above and the shells have a large quantity of explosives these must therefore be separated from each other. 

Sparks or Fire Dust Sparks Reddish Fl ickering Golden S iIver Flash s j-J. I J k i ... 

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