Posted 21 September 2006 - 09:57 AM
Composition Type: colored stars
The Composition: (by weight)
Ammonium perchlorate .............70%
Copper powder ........................15%
Precedure/Preparation: standard, dissolve shellac in boiling ethanol. Be careful about water in ethanol
Any Precautions/Incompatabilities: This composition is incompatible with nitrates, chlorates and water.
Here are some videos of this composition
10g pumped blue star
Posted 21 September 2006 - 01:16 PM
Posted 21 September 2006 - 02:07 PM
Posted 21 September 2006 - 02:29 PM
What mesh size is your copper powder?
Posted 21 September 2006 - 02:56 PM
Its very fine brown powder. I dont know what mesh size is it...
Posted 22 September 2006 - 01:50 PM
Beautiful, I hope to try this as soon as I make the Cu powder. Thank you for sharing this great composition.
Posted 23 September 2006 - 01:10 AM
Posted 23 September 2006 - 03:22 AM
The sky is my canvas, and I have 2,113 pounds of powdered paint in the workshop.
Posted 24 September 2006 - 08:32 PM
Binding with shellac and EtOH also seems to keep it moisture-resistant at least for a while as well.
Posted 25 September 2006 - 05:03 AM
The copper powder I used was of electrolytical grade but not as fine as one might think. I'm sure everything passed a 100 Ám sieve though!
Posted 27 September 2006 - 12:02 PM
Greetings from Malta ...........
Posted 06 October 2006 - 10:22 PM
Overall, the use of my perchloric acid was justified.
Copper was electrolytic grade(whatever that means), and at that mesh was still a very shiny powder, not like the precipitated stuff, which is even finer.
Tuesday I attempt to obtain shellac!
Posted 06 October 2006 - 10:45 PM
I was looking into making Cu powder with CuSO4 and Zn, but I think I will just buy it.
Posted 07 October 2006 - 04:13 AM
Posted 08 October 2006 - 12:55 AM
Posted 08 October 2006 - 09:52 AM
You should get a fine percipitate no matter what size Zn you use. What will change is the time it takes for the reaction to finish.
I went ahead and tried this out. First, I made a nice solution with roughly 1L of water, and 102g of CuSO4*5H2O. I then proceded to stir in 20.5g of Zn dust. The solution turned black at this point. I let it sit for ten minutes, then gave it another good stir. I scraped my stirring device along the bottom of the reation vessle (fork in pickle jar) to bring up a brownish muck. Everything was left for about an hour to finish off. I proceded to filter out the percipitate using 3 coffee filters, saving the filtrate to make sure most of the Cu had been filtered out. When it had been, you cold see a bit still in the filtrate, though, not enough to worry over. I scraped as much off of the filter as I could, but possibly a gram remained stuck in the filter. I put the brownish red muck in the oven too dry for 2 hours. Once dry, I powdered and weighed it, finding 14g of Cu dust.
Now, I mixed everything up, using all of the Cu. My AP is 200 micron, so it could still be seen in the mix. I burt about half a gram, greeted by a pale blue flame, though the flame was rather large. I was only 5 or so feet away, which could explain the lack of the coplight color.
After this, I added 9 grams of R45-M, or about 9.5%. Yes this is freakishly high, but it really isn't too much by volume. To this, 4.5 grams of curative was added to give a very hard cure.
While still gooey, I burnt a drop of it. The blue now was deeper, and it burnt much slower than before.
Now, 12 hours later, the block that I formed it in is overall cured. I'm going to make some cut stars out of it, and hopefully test it in a mine or shell. So far it looks very promising.
Posted 25 December 2007 - 01:01 PM
I still like this formula. Just need to get a better feel for it I suppose.
Posted 26 December 2007 - 08:04 AM
"Who is John Galt?"
Posted 26 December 2007 - 03:58 PM
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