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Silver cascade, modified


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#1 Pretty green flame

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Posted 09 September 2006 - 06:41 AM

Name of composition: Silver cascade, modified
Composition Type: Silver streamer
Creator: Some guy from AFN, i just modified it a bit to suit my preferences
Color/Effect: Very bright with aluminium sparks (essentially a silver streamer)
The Composition: (by weight)

KNO3 - 45%

Magnesium - 15% Note: The Mg should not be very fine or of the very reactive flake variety or it will result in a flash. 100mesh is the limit.

Aluminium atomized - 30%

Sulfur - 10%


Any Precautions/Incompatabilities: Magnesium should be treated with linseed oil to minimize the chance of accidental ignition.

Precedure/Preparation: Ball mill together the KNO3 and sulfur then diaper in the metal powders. Bind with a 10% solution of shellac in alcohol. The stars should be pumped.

Video will be posted this evening, probably.

Edited by Pretty green flame, 09 September 2006 - 08:51 AM.

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#2 Pretty green flame

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Posted 09 September 2006 - 12:18 PM

Here it is, as i promised. An action shot of the star burning (on ground, will do future tests in air)

Posted Image
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#3 rocket

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Posted 09 September 2006 - 08:52 PM

Just a quick one about the shellac as Iíve never used it before nor have I used this method to bind stars.
Just say Iíve got a 10g batch do I just weight out 1g of shellac and dissolve in alcohol and add the comp.

Also would methylated spirits work to dissolve the shellac?
Most people waste money, but I burn mine away.

#4 TheSidewinder

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Posted 09 September 2006 - 09:27 PM

Yes, it's one additional gram of shellac to a 10 gram batch of comp.

You're better off mixing the shellac with the meal by screening or bag-mixing, then adding the alcohol. Methylated spirits should work fine.

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#5 rocket

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Posted 09 September 2006 - 09:33 PM

Thanks for that, now to bunnings to get some shellac
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#6 Pretty green flame

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Posted 09 September 2006 - 10:31 PM

Just a quick one about the shellac as Iíve never used it before nor have I used this method to bind stars.
Just say Iíve got a 10g batch do I just weight out 1g of shellac and dissolve in alcohol and add the comp.

Also would methylated spirits work to dissolve the shellac?

You make a 10% solution of shellac and then you add the solution to the composition, only so much that until you get the right consistency for pumping.
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#7 rocket

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Posted 09 September 2006 - 11:36 PM

Ah k cool I see what you mean. Iíll do it that way then. I got shellac for $15 for 300g I donít know if that expensive, also found some xylene during my trip to the hardware store but I donít have a use for it as yet.
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#8 rocket

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Posted 10 September 2006 - 01:39 AM

Update:
I must say these star look great. Had a bit of a problem though I add to much solvent so I thought to my self I no Iíll warm it up and evaporate it, so I did the after a with I noticed a bad smell coming from it I did think much of it at the time so I continued to pumping the then drying. I ended up making the room that I had them drying in smell horrible. What I think coursed this was the sulfur.

What do you guys think?
Most people waste money, but I burn mine away.

#9 Pretty green flame

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Posted 10 September 2006 - 01:43 AM

Are they getting any warmer, if so, you might have a problem, probably water in the solvent.
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#10 rocket

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Posted 10 September 2006 - 01:53 AM

Nah there cold, well there not warm to touch any way.
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#11 TheSidewinder

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Posted 10 September 2006 - 07:36 AM

That smell wasn't Ammonia, was it?

If so, you're getting a reaction of some sort. Are you sure you didn't have any water in the mix? Methylated spirits can contain a fair bit of water, IIRC?

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#12 rocket

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Posted 11 September 2006 - 01:14 AM

Well I donít know what ammonia smell like so I donít know, but it did smell a bit like something was rotting (as me sis found out, lol).

When I first added the comp I noticed some bubble but very little I came to the conclusion that is was from me mixing it.
After I took it off the heat it was a yellow colour thatís why I thought it might have had something to do with that sulfur in the comp.
Most people waste money, but I burn mine away.

#13 Frozentech

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Posted 11 September 2006 - 01:24 AM

Well I donít know what ammonia smell like so I donít know, but it did smell a bit like something was rotting (as me sis found out, lol).

Do you have pet cats ? If so, ammonia smells like cat piss, or a cat litter box that needs cleaning.
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#14 rocket

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Posted 11 September 2006 - 02:26 AM

Well I donít know what ammonia smell like so I donít know, but it did smell a bit like something was rotting (as me sis found out, lol).

Do you have pet cats ? If so, ammonia smells like cat piss, or a cat litter box that needs cleaning.


No i can say it did. It may have been the shellac.


Update: It was ammonia that I smelt, I made some MgAl the other day and it smelt strongly of ammonia
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#15 Bonny

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Posted 17 June 2008 - 06:39 AM

Sorry to drag up a really old one here...
I was itching to clean up some chems, and had some 100m Mg laying around. I made a batch of cut stars with this formula. They turned out quite crumbly... I'm going to re-wet and pump as soon as I slap together a small star pump. Anyway, I put a couple stars on a pc of visco and they took fire quite easily. The burnrate was faster than I'd have thought and the effect was a nice shower of silver sparks. I'll probably pump 3/8" stars and then step prime.

#16 Bonny

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Posted 20 August 2008 - 05:38 PM

I finally got around to testing this comp in a shell. The video is not that good, but the silver great in person. This was a 3" can shell burst with 4:1BP/vermiculite and 1 tbsp of whistle as a booster.

http://www.youtube.c...F59c&hl=en&fs=1

#17 elstevo

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Posted 07 October 2008 - 06:08 PM

do these stars need to be primed?
Im a pyro, if you see me running away its probably a good reason for u to do it aswell.

#18 Mumbles

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Posted 07 October 2008 - 11:17 PM

It's a good idea to prime everything.
Just so you guys quit asking, here is the link to the old forum. http://www.xsorbit2....forum/index.cgi

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#19 Pretty green flame

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Posted 08 October 2008 - 12:10 AM

Indeed it is, these stars especially, either a step prime or the Fence post prime.
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#20 Bonny

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Posted 08 October 2008 - 12:25 PM

IIRC, I used a 3 layer step prime with this comp. The last layer of prime (BP only) applied as a thick slurry into which I dipped the stars and then rolled them in granulated BP.




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