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Author: Subject: Sensitivity of chlorate explosives/cheddite.
Merryp
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[*] posted on 13-1-2020 at 20:06
Sensitivity of chlorate explosives/cheddite.


Now, I heard that cheddite was used as a shotgun primer, but I always assumed it contained some kind of sensitizer.

Yet, wikipedia says: Since the 1970s, Cheddite is the commercial name for an explosive compound used as an explosive primer for shotgun cartridges. It contains 90% potassium chlorate, 7% paraffin, 3% petroleum jelly, and traces of carbon black.

I was wondering whether 90% chlorate mixtures are really that sensitive on their own, given that cheddites around 80 to 85 percent were used in large quantities for rock blasting in the 1800s.

Thoughts?
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JohnDoe13
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[*] posted on 13-1-2020 at 23:29


Another wiki bullshit.
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Merryp
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[*] posted on 14-1-2020 at 00:52


Quote: Originally posted by JohnDoe13  
Another wiki bullshit.


Well, the cheddite shotgin primer does exist, no idea what's in it, though.
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XeonTheMGPony
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[*] posted on 14-1-2020 at 04:04


if any thing that would be the shot cup load, it would still be using a fulminate or other primer.

the shot cup allows for a larger flame jet to be pushed into the main powder charge
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[*] posted on 14-1-2020 at 16:11


Quote: Originally posted by XeonTheMGPony  
if any thing that would be the shot cup load, it would still be using a fulminate or other primer.

the shot cup allows for a larger flame jet to be pushed into the main powder charge


It is not an absolute BS- some formulations for primers included KClO3 plus fulminate (but, even so, this mix hardly can be named "sheddite")




Women are more perilous sometimes, than any hi explosive.
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LardmanAttack
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[*] posted on 14-1-2020 at 18:42


I've been working with chlorate based explosives for around 8-9 months now, Their sensitivity isn't as high as you'd imagine. They're still fairly sensitive (especially in the case of armstrongs mix) but it's not off the wall sensitive, surprisingly useful, easy explosives for the amateur when handled right and properly detonated.

As for the shotgun primer, I don't know about the formula that wikipedia mentions, but it's possible that it may work as a primer, it would have to be hit fairly hard though.
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markx
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[*] posted on 15-1-2020 at 06:19


Chlorate mixes with liquid hydrocarbons tend not to be very sensitive towards mechanical manipulation, but perhaps a certain combination exists that could be used in a primer application.
Mixes using carbon or carbon/sulfur composition as fuel can quite successfully be used as a percussive cap formulation though.




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MineMan
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[*] posted on 15-1-2020 at 08:01


potassium chlorate mixed with aluminum, nitromethane and nitrocellulose is VERY sensitive... much more so than one would expect for a putty.
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[*] posted on 15-1-2020 at 15:43


Quote: Originally posted by MineMan  
potassium chlorate mixed with aluminum, nitromethane and nitrocellulose is VERY sensitive... much more so than one would expect for a putty.


What about the mix with trinitronaphthalene? Maybe plus some mineral oil to decrease sensitivity?




Women are more perilous sometimes, than any hi explosive.
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