Talk:Flash powder

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You have new messages (last change).

The current defnition. as posted, containts factual inaccuracies, some of them dangerous. Notably A Lot Less than '4 ounces' of flash will 'explode' removing fingers, etc.

The '4 ounces equals 1 stick' is a common myth, and just that: Myth.

It's gone now. Thanx 68.39.174.150 21:01, 28 Apr 2005 (UTC)

Proper professionals with experience of fireworks manufacture will be aware of this. 'casual browsers' may be mislead. best

[edit] Huge removal

I axed alot of this page because I didn't think Wikipedia was the appropriate place for explosives making instructions. If I'm in error here someone can revert or better yet rewrite the instructions and stick them on Wikibooks. Thanx 68.39.174.150 21:05, 25 Apr 2005 (UTC)

  • I think we should at least list the ingredients of flash powder, and perhaps one or two common formulas. I agree we don't need a dozen different "recipes", especially when (A) the text appears to be a copyvio, and (B) the uploader admits two are not even tested. Firebug 04:20, 26 Apr 2005 (UTC)
OK, I added ths list of ingredients back with no details on use. I know nothing of fireworks terminology so if I try and write something (From the previous revision) I know it'll be vauge or blatantly newbieish. BTW, do you think there should be some warning about the dangers of it, or is it fine without one? Thanx again 68.39.174.150 21:01, 28 Apr 2005 (UTC)
I'm adding the basic (perchlorate and aluminum) equation. I'll show the work so it's not a mystery where it came from. I agree, a cut-and-paste from totse is NOT a good idea. It probably wasn't copyvio, cause every file on totse has a little disclaimer that says something like "to the best of our knowledge this text is freely available for replication and use" or something. --AK7 20:33, 23 November 2005 (UTC)

[edit] What causes report?

Flash powder has all solid reactants and all solid products, right? So what causes the "report?" I would expect that if there were gaseous products a report would be made, due to a pressure wave. Why is there a rise in pressure in the cointainer if no gas products are made? Is the temperature rise alone responsible for increasing the temperature sufficently to cause a "report?" I have never made flash powder, so I'm just going on the equations. KCl and Al2O3 are both solids.-AK7 16:00, 15 December 2005 (UTC)

  • http://en.wikipedia.org/wiki/Explosion For god's sake, you dont even have to change website. All explosions Consisto of an increase in volume and temperature, combined with a relese of gas, it's not just the gas thing, but also the air that is displacedfrom around the explosive will be pulled back( given the vacuum produced).--201.208.149.148 19:28, 24 February 2006 (UTC)
  • The products of combustion include potassium chloride, which has a boiling point of 1500 °C, and aluminium oxide, with a boiling point around 3000 °C. Now the peak reaction temperature of course depends on a lot of conditions, but it is certainly well over 1500 °C and quite likely over 3000 °C (many sources suggest ~4000 °C). So there are no gaseous products after the explosion, even milliseconds after the explosion, but there most certainly are during it. The report is almost certainly caused by expanding high pressure products of combustion. -- Securiger 09:07, 18 May 2006 (UTC)
  • Another intermediate gas formed is oxygen from the decomposition of the (per)chlorate.

[edit] More compositions

I agree that wikipedia is not the place for instructions on how to make explosive compositions. However, i think it should give or at least mention, the less common compositions, for example, barium nitrate with alluminium. Thankyou for reading my suggestion. Also the use of "be warned" in paragraph eight, is somewhat assuming the reader is considering preparation of the composition, which is not appropriate.

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