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Really slow photoflash


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#1 Pyroitaly

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Posted 22 June 2022 - 12:39 AM

Hi pyros,
I was thinking there Is a composition named slow photoflash which consist of:
-potassium perchlorate 18
-barium nitrate. 10
-magnesium fine. 36
-shellac. 36

What do you think about this composition? There Is a composition with magnesium and magnalium with only 14%of oxydizer which makes a big flash.. i would like photoflash as long as possible...Someone have tryed this composition??

#2 Richtee

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Posted 22 June 2022 - 03:32 AM

There’s this stuff listed-

 

Attached Files


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#3 Pyroitaly

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Posted 22 June 2022 - 04:07 AM

Yes, Someone have a video or has tried this composition?

Edited by Pyroitaly, 22 June 2022 - 04:10 AM.

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#4 Arthur

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Posted 22 June 2022 - 06:02 AM

Slow photo or illuminating flashes are often under oxidised and rely on the little oxidiser present spreading the mix which can then burn in the air.



#5 Richtee

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Posted 22 June 2022 - 05:03 PM

As you can, or SHOULD see, perchlorate is not used, but chlorate.

 

No, I have not tried it. I have no application for it.


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#6 Pyroitaly

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Posted 22 June 2022 - 05:23 PM

Sorry, i have made a transcription error..Why cant perchlorate be used instead of potassium chlorate?

#7 h0lx

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Posted 28 June 2022 - 01:52 AM

In my series of experiments which I would best entitle as "What else can magnesium reduce?", a lot of the ones, when overfuelled produced an absurdly bright and long lasting fireball due to vapourised Mg burning in air. 1:1 plaster of paris:Mg powder comes to mind(however it produces quite orange illumination). 1:1 SrCO3:Mg produced a red one as expected, however didnt have that much power, adding 10% perchlorate helped it along.

Basically have a sulfate/carbonate/other slowish oxidiser and magnesium in a fuel rich ratio and voila.



#8 Arthur

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Posted 28 June 2022 - 04:44 AM

http://www.thegreenm.../pfp/flash.html

 

Search this and see how many flash formulae there are, and how many are now regarded as unduly dangerous



#9 Pyroitaly

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Posted 28 June 2022 - 06:29 AM

In my series of experiments which I would best entitle as "What else can magnesium reduce?", a lot of the ones, when overfuelled produced an absurdly bright and long lasting fireball due to vapourised Mg burning in air. 1:1 plaster of paris:Mg powder comes to mind(however it produces quite orange illumination). 1:1 SrCO3:Mg produced a red one as expected, however didnt have that much power, adding 10% perchlorate helped it along.

Basically have a sulfate/carbonate/other slowish oxidiser and magnesium in a fuel rich ratio and voila.


Thank you!




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