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crackling star's


Zumber

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hi to all friends...

here I got some chinese composition for crackling

silver wave crackling-

kno3....20

bano3.....5

sulfer.......20

black CuO.....10

charcoal....20

Ti.....20

dext.....5

 

crackling-

CuO......70

MgAl.....30

dex.....5

 

I need to know if

1)In first and second compo. should I replace Ti with coated coarse mg...??

2)If I make round star ...will it crackle or should I make em' into microstars and use matrix composition...??

3)what is friction sensitivity for both composition..?? i mean to say are they friction sensitive like flash powder..??

thanks

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I know where you got the formulas, and just keep in mind that they may be fake or false. Replacing Ti with magnesium will probably kill whatever effect there is. MgAl may be more suitable.

 

Treat all dragon egg formulas like flash.

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swapinsutar, I will be happy to see some dragon eggs with out the toxic lead oxide or expensive bismuth oxide. please take photos/videos when you try the comps.

good luck.

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Out of curiosity, where did they come from? Why might they not be legit?

 

Any idea what mesh Ti? I suppose it would mainly be for sparks and not a component of the smoulder/ flash stage? Without any MgAl in the first formula and with the high sulfur content I would imagine it would be more similar to a glitter effect.

 

I like crackle but not very hopeful these will be anywhere near the effect of good dragon eggs.

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The original source is this thread: http://www.amateurpy...ese-comps-info/

 

If you look at them, and have enough background, you will probably notice that a few of them look a bit off. I take this to mean that either the Chinese company(ies) that these formulas were originated at are either intentionally providing misleading information, or that there are some errors in the formulas. Some may be just fine, but others possibly will not work as intended.

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I have always liked dragon's eggs because of how much noise comes from such a small object. At least good ones I make, the consumer versions can be quite anemic. So I decided to try the second formula since it is so simple and only took a few minutes. I dropped the dextrin and bound them with NC lacquer like normal DE. And they don't work. When they get hot enough to liberate the oxygen the the CuO they make a nice flash, similar to standard flash powder when bound with NC. They might make a nice star core if you would like a star to terminate in a flash. But they don't make any noise unfortunately. That will still require the costly bismuth compounds.

 

Just thought I would add my experience with the second formula. I'm not sure I feel like messing with the first one if the second one doesn't work.

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FlaMtnBkr, not sure if this will work or not, but try adding sulfur. I heard in order to make a sound sulfur has to be added. Remember this is a guess and I have not tried it so be careful. There is no incompatiblies though adding sulfur. Not sure if it will work or how much to add though.
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  • 3 years later...

Have somebody ever tested this composition

CuO......70

MgAl.....30

dex.....5

 

It explodes only if has been heated for a long time at high temperature. I unsuccessfully used rather hot veline's prime trying to make it work in a star.

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Have somebody ever tested this composition

CuO......70

MgAl.....30

dex.....5

 

It explodes only if has been heated for a long time at high temperature. I unsuccessfully used rather hot veline's prime trying to make it work in a star.

As far as I can tell, from my memory, these are just 3 of the 5 main ingredients in USAPyro's dragon eggs.

 

Some very hot burning, like KClO4/MgAl in the original recipe, or maybe BP/MgAl composition might do the trick.

 

I have used BP/MgAl to ignite thermite-like compositions. So I know that it burns very hot. But I have no experience, or background-knowledge, to say if it will do the trick in dragon eggs.

Edited by Ubehage
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Perhaps I should have been more clear with my posts from 3 1/2 years ago. That recipe is straight bull shit. Use real dragon egg formulas based on lead or bismuth.

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Good slag layer is obtained with a phenolic resin. 10-20% in the composition. It gives hot slag which heats the core.

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Dragon eggs contain another oxidizer in addition (lead- or bismuth-based) which will heat the star form within. When it glows bright red, it will explode. Priming extremely hot instead may work, but it's much less efficient, and probably much less reliable, than using a proper dragon egg formula.

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