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pdb
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Cutting with primary
Cutting test of bristol board with a primary explosive.The primer is nitrobenzenediazonium perchlorate, with a linear density of 4.5 mg per cm.
Unfortunately, other than Edmund Herz's 1911 patent and its mention in COPAE, there are no studies of this primer that I know of. It has not found
use because diazonium salts have a bad reputation for instability, and also because it is said to be hygrometric. I dispute this last point: I have
kept samples of it for more than twenty years without noticing any hygrometry, nor any degradation except a darkening of its color.
It was used routinely in the laboratory by Henri Muraour (a French explosives researcher in the 1930s and 1940s) when he needed a particularly
powerful primer. In my own tests, I estimate its priming power against PETN and RDX to be about twice that of AgN3 of equal weight.
I do not know its VOD.As for its sensitivity to mechanical actions, I tend to subjectively equate it to that of Hg(CNO)2. DDT is immediate, with no
perceivable induction time.
  
Edit(woelen): Fixed issue with one of the pictures on request of user pdb.
[Edited on 2-12-21 by woelen]
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pdb
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Next try with a 41 cm path. Photo quality is poor due to lack of light.
 
Edit(woelen): Fixed issue with one of the pictures on request of user pdb.
[Edited on 2-12-21 by woelen]
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Brightthermite
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These are so cool
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Fulmen
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Bravo!
We're not banging rocks together here. We know how to put a man back together.
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Laboratory of Liptakov
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Finally someone with Art of primary compounds. Sometimes the VoD is not so important a like results. And this is the case.
Great work...
Maybe try use thin Copper plate. 0,1 mm I estimate. Detonography
is very interest art.
Development of primarily - secondary substances CHP (2015) Lithex (2022) Brightelite (2023) Nitrocelite (2024)
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Brightthermite
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Quote: Originally posted by Laboratory of Liptakov  | Finally someone with Art of primary compounds. Sometimes the VoD is not so important a like results. And this is the case.
Great work...
Maybe try use thin Copper plate. 0,1 mm I estimate. Detonography
is very interest art.
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Beautiful!! Once I find something to act as a backing that is my next project!
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pdb
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| Quote: Originally posted by Laboratory of Liptakov | Finally someone with Art of primary compounds. Sometimes the VoD is not so important a like results. And this is the case.
Great work...
Maybe try use thin Copper plate. 0,1 mm I estimate. Detonography
is very interest art.
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Yes, I have done detonography with a sheet of plexiglass to transmit the detonation wave. But your method with a water balloon is much easier and
effective!
By the way, could you please check in the Russian literature if there is a study on nitrobenzenediazonium perchlorate? Some years ago someone found a
paper in Russian about dinitrobenzenediazonium perchlorate, but this compound is of no interest because it only deflagrates: even priming it with
another primer, I couldn't get it to detonate.
Speaking of art, I have a "work" that I could call "entanglement". Look at the pictures
  
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katyushaslab
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nitrobenzenediazonium perchlorate? Is that the one where you start with 3-nitroaniline, dissolve it in HClO4/HCl mixture and add NaNO2 to perform
diazonation? I vaguely recall reading yourself and Microtek posts about it many years ago.
I also cannot for the life of me remember if HClO4 was strictly needed, or if a perchlorate salt worked fine.
Edit: Also, what are you using to "bind" your material here? Painting it on while wet and allowing to dry, or nitrocellulose/similar as a binder? I
wonder if a thin layer of this material, bound with NC or similar painted onto an object such as a leaf, affixed to a metal plate could work for
making artwork?
[Edited on 22-10-2021 by katyushaslab]
[Edited on 22-10-2021 by katyushaslab]
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pdb
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| Quote: Originally posted by katyushaslab | nitrobenzenediazonium perchlorate? Is that the one where you start with 3-nitroaniline, dissolve it in HClO4/HCl mixture and add NaNO2 to perform
diazonation? I vaguely recall reading yourself and Microtek posts about it many years ago.
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Yes !
Never tried. It should work with an excess HCl.
I didn't bother, I just added about 10% flour.
| Quote: Originally posted by katyushaslab | | I wonder if a thin layer of this material, bound with NC or similar painted onto an object such as a leaf, affixed to a metal plate could work for
making artwork? |
You must first find a material that can produce "art" after being subjected to a shock wave. Ideas welcome !
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Herr Haber
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Could you guys elaborate on the water balloon, the plexiglass or point me to other topics that I might have missed where you talk about that ?
You made me curious 
The spirit of adventure was upon me. Having nitric acid and copper, I had only to learn what the words 'act upon' meant. - Ira Remsen
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Laboratory of Liptakov
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detonography
Yes, ballon water works
https://www.youtube.com/watch?v=zeAEwi04PoI
[Edited on 22-10-2021 by Laboratory of Liptakov]
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pdb
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The plexiglass assembly consists, from top to bottom, of a sheet of explosive (PETN preferable because the critical thickness is very low) with a
centered detonator, then a plexiglass disk of about 1cm thickness to homogenize the shock wave, then the object to be engraved (a vegetable leaf), and
finally a polished copper or brass plate.
It works, but it is more complicated than the water balloon method.
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pdb
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Cutting with AgN3
The same cutting experiment with AgN3 does not work well: the size of the crystals (much larger than the nitrobenzenediazonium perchlorate crystals)
and especially their high density prevent them from remaining suspended in the water + flour mixture. So it is difficult to spread the mixture on the
cardboard.
Another detail: I never managed to capture a nice flame from an AgN3 explosion, whereas nitrobenzenediazonium perchlorate always gives great pictures
with sparks all over the path.
edit(woelen): Removed erroneous download file on request of pdb
[Edited on 13-3-23 by woelen]
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Herr Haber
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Thank you both.
Your solutions are way better than anything I have thought of so far.
The water balloon contraption is art in itselft.
The spirit of adventure was upon me. Having nitric acid and copper, I had only to learn what the words 'act upon' meant. - Ira Remsen
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pdb
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Trial with (NCN3)3
This time I tried to form a trail of CTA (cyanuric triazide) by melting (m.p. 94°).But once liquid, the CTA soaked the cardboard, in which it
diffused giving it a certain translucence, like an oil stain.
As a result, the behavior in the flame is quite strange: I put two extracts in the video. You can see that the CTA crackles, without continuity in the
detonation, but with continuity in the crackling.
It is in a way halfway between nitrobenzene diazonium perchlorate which detonates in one go, and AgN3 which detonates in segments, without continuity
between the successive detonations
edit(woelen): Removed erroneous download file on request of pdb
[Edited on 13-3-23 by woelen]
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Bert
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| Quote: Originally posted by pdb | The same cutting experiment with AgN3 does not work well: the size of the crystals (much larger than the nitrobenzenediazonium perchlorate crystals)
and especially their high density prevent them from remaining suspended in the water + flour mixture. So it is difficult to spread the mixture on the
cardboard
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I theorize a small additional % guar gum or xanthan gum would provide a stiffer gel capable of keeping your larger/denser crystals suspended.
Prepared wallpaper paste might be better with heavy crystals than plain than flour/water
Or maybe COOK the flour/water mixture? Brinnng it to a simmer while stirring and allow to cool before adding primary? Explosive gravy...
I keep food grade xanthan and guar gums on hand. Useful for everything from making hot sauce that doesn't run off your ribs & wings to making cut
stars.
[Edited on 11-4-2021 by Bert]
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Laboratory of Liptakov
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pdb:
Spectacular video with paper. Great work. Magic paper. A like shooting into paper from invisible laser 1000W. Or beams of death. All others important
for better results said Bert...
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pdb
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Again, the nitrobenzenediazonium perchlorate provides a beautiful image, captured at 240 fps. I think this is due to the recombination of the
detonation products, from the raw formula C6H4ClN3O6, which lasts longer than the detonation itself (which, as a thin trail, must be quite low, maybe
2000 to 3000 m/s... however enough to travel about a meter per image). By the way, the smell of the explosion is very pleasant... well, I think so.
With inorganic azides, or fulminates, the detonation products are too simple to cause a recombination. So it is rare to capture the detonation at 240
fps, and at best you just see a white flash.
  
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Laboratory of Liptakov
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Mad perchlorate. Exotic formula. Spectacular photos...
Development of primarily - secondary substances CHP (2015) Lithex (2022) Brightelite (2023) Nitrocelite (2024)
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MineMan
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That paper video was so so cool. Please do more experiments for that. It’s like a detonating fuse. There has to be a use for it.
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pdb
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This time I shot the back of the Bristol to avoid the camera being blinded by the flash of the detonation. I also put a black background screen to
avoid any reflection of the light.
Too bad, the detonation was captured on 2 frames. On the first one, the detonation occurred at the half of the sensor scan. And the second one is
particularly nice. However, I hope next time to capture the entire detonation on a single frame.
     
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Laboratory of Liptakov
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Incredible art work...Hat off....
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Mateo_swe
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Wow, really cool.
I liked the different types of leaf on the metal plates, looks like the ancient fossils they find enbedded in stone.
I really have to try this some time.
Does other explosives work too if one work out how big charge to use by some trials?
The waterballon method seem very good.
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simply RED
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Really beautiful, should be published in some scientific-popular journal.
When logic and proportion have fallen sloppy dead...
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B(a)P
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What is the composition that you have used here? It certainly doesn't look like much to do that, what mass of material did you use?
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