Star Formulas
#571
Posted 13 October 2010 - 11:03 AM
used for sundry preparations, and especially for experimental
fire-works."
Dr. James Cutbush
#572
Posted 13 October 2010 - 11:54 AM
Don't all nitrates absorb water more or less, even if the ammonium, sodium and strontium salts do it in the extreme?
Yep, but this mix gives a significant rise in moisture absorbtion. The poswer will be physically wet if left out for 12 hours (OK it may not be in the desert).
#573
Posted 13 October 2010 - 05:09 PM
#574
Posted 13 October 2010 - 05:22 PM
but if its going to be feasible, then its got to be cheap.
#575
Posted 14 October 2010 - 01:59 AM
#576
Posted 14 October 2010 - 08:31 AM
potassium nitrate 55
potassium carbonate 27
sulfur 18
Though it has one drawback that is impossible to overcome: it only works when molten together and heated up. It doesn't catch fire from a fuse.
used for sundry preparations, and especially for experimental
fire-works."
Dr. James Cutbush
#577
Posted 14 October 2010 - 03:47 PM
The ideal BP substitute would be YP -- yellow powder:
potassium nitrate 55
potassium carbonate 27
sulfur 18
Though it has one drawback that is impossible to overcome: it only works when molten together and heated up. It doesn't catch fire from a fuse.
I strongly advice you not to make this compound, it will detonate when heated to long.
Also it deflagtates way to fast to be usable as a blackpowder substitute.
Shelflife will be a couple of days at best as it's ability to draw moisture from the air makes it useless.
There is no ''easy'' substitute for black powder, if there was we would already be using it.
#578
Posted 14 October 2010 - 04:01 PM
I strongly advice you not to make this compound, it will detonate when heated to long.
Also it deflagtates way to fast to be usable as a blackpowder substitute.
Shelflife will be a couple of days at best as it's ability to draw moisture from the air makes it useless.
There is no ''easy'' substitute for black powder, if there was we would already be using it.
I know that it detonates when heated; that's why I stress that it cannot be lit properly with a fuse.
I'm not that sure about the fast deflagration, though. I have used "weak" flash with magnesium and barium or potassium nitrate to lift 2" shells, before I had a proper ball mill. It can't possibly be "stronger" than nitrate flash. The estimation from laboratory tests is that it is 3 times "stronger" than BP, though I don't know in which respect; burning, gas volume, brisance etc.
used for sundry preparations, and especially for experimental
fire-works."
Dr. James Cutbush
#579
Posted 15 October 2010 - 09:31 AM
#580
Posted 31 October 2010 - 11:38 PM
#581
Posted 01 November 2010 - 05:16 PM
used for sundry preparations, and especially for experimental
fire-works."
Dr. James Cutbush
#582
Posted 01 November 2010 - 07:33 PM
Maybe I shouldn't have said strontium nitrate. I have no first hand knowledge of working with that combination. I do use barium nitrate + cryolite for a lime star I like though, and it works just fine.
I just confused myself. The orange star I like uses strontium nitrate + sodium oxalate, and it works just fine.
#583
Posted 16 November 2010 - 06:11 PM
used for sundry preparations, and especially for experimental
fire-works."
Dr. James Cutbush
#584
Posted 30 November 2010 - 01:05 AM
I would say try these:
KClO3, 55
CuCl2, 23
PVC, 10
Shellac, 7
Dextrin, 5
KClO3, 57
BaCl2, 20
Shellac, 8
PVC, 10
Dextrin, 5
Only try them in small amounts at first if you scale is capable of measuring in 1/10 or 1/100 of a gram. Raise or lower the fuel value until you recieve a preferable burn rate or light output. Raise the KClO3 for a higher light output. Once you've found the right composition, make a larger amount.
It would help if you told me what chemicals you have so I'm not troubleshooting my way through this...
MHD do you think that the formula you give me for BaCl2 burn hotter enough for emitting green light?
#585
Posted 30 November 2010 - 03:54 AM
With that being said, how has your experience been with copper chloride? I've had lovely experiences using it in stars with quite a number of fuels.
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