1569 replies to this topic

[paul]

Erm, I have to look it up, sasman! ! I tested so many silvertails to see which gives the best effects....

Ah I have another video for you, guys. A 3" dayshell which produces a very stable cloud in the sky. This cloud went on and on through the sky :D

3" Cloudshell

It?s a nice effect, not very loud but I?ve seen this in daytime fireworks before and so I had to test it :)

Edited by paul, 28 November 2004 - 06:57 PM.

[Creepin_pyro]

I love the smoke ring Very nice indeed...

Was that intentional?

[paul]

The smoke ring? No :) It was windless..... Sometimes you get a ring, but most of the time not!

So it was pure luck.

[Pretty green flames]

That thing went pretty high

What composition did you use ?
How much did the shell weigh and how much lift was used

[paul]

I think it only seems that the shell went so high, because the timefuse was set to 4sec. It was on the way down as it exploded.

The liftcharge was 20g CIA blackpowder. Sorry, but I can?t say how much it weigehted. It only was a testshell

[moe]

Ho,

the smokering was really nice. i'm the guy, who shot the shell, so i was under the ring and was able to see through the ring kkpaul only filmed, but it seems as if he didnt well, because the break is not on the video
perhaps i will load up an video this evening... it's a quite nice shell

ok, HERE is the link...

Edited by moe, 01 December 2004 - 08:33 PM.

[paul]

Yes! This shell was really really impressive, full of chlorate zinc spreaders and a nice H3 break!

The best shell of moes and my shells so far.

Have a look :)

[Creepin_pyro]

Fantastic break there A very beautiful shell.

Just one thing: I've never seen zinc spreaders look red before Did they look that colour in real life?

[moe]

Of course they did, even more fantastic.

The "real" zinc-spreaders are made with potassium chlorate. the zinc-spreader containing potassium nitrate are no "real" zincs, becaus they don't spit red sparks everywhere. it's no real red, more silver or something like this.

the effect of kclo3-containing stars is really impressive. try !

the formula has been taken out of wouters formula collection:

Zinc dust.........................................72
Potassium chlorate................................15
Potassium dichromate..............................12
Granular charcoal.................................12
Dextrin...........................................2

bind with water

Edited by moe, 30 November 2004 - 01:49 PM.

[Creepin_pyro]

Wow Never heard of Chlorate red spreaders before, and I've never been very impressed with Nitrate ones. You've inspired me to get out my rarely-used Zinc!

Thanks for the formula. Looks to me like the Dichromate is acting as something other than the usual stabiliser... Any idea if the formula would work without it? I'm scared of Dichromate

[neo]

never heard of Potassium dichromate... so i looked it up in an msdn.
looks like a nice material

Health Rating: 4 - Extreme (Cancer Causing)
Reactivity Rating: 3 - Severe (Oxidizer)
Contact Rating: 3 - Severe (Life)
Storage Color Code: Yellow (Reactive)

[italteen3]

Wow   Never heard of Chlorate red spreaders before, and I've never been very impressed with Nitrate ones.  You've inspired me to get out my rarely-used Zinc! 

Thanks for the formula.  Looks to me like the Dichromate is acting as something other than the usual stabiliser...  Any idea if the formula would work without it?  I'm scared of Dichromate 

I believe Dichromate acts as a stabiliser with Magnesium containing formulas. Though there is no Mg, and like you pointed out it doesnt have its usual stabiliser qualities. Dichromate also acts to lower the ignition temperature of comps.


I believe . Please correct me if my notes are wrong.

[Creepin_pyro]

I'm aware of the usual application of Potassium Dichromate in Mg containing comps. Seeng as this comp uses no Magnesium, I'm assuming it is being used as something other than a stabiliser. I've never heard of Zinc needing protection... Just got me thinking....

You say the Dichromate lowers the ignition temp.... I'm thinking the formula has used the Dichromate as a replacement for sulphur (for obvious reasons) Does this sound right?

If this is correct, would there be a similar substance that would work to lower the ignition temp without any incompatibilities? Mabye if I change the Chlorate for Perchlorate and the Dichromate for Sulphur?

Or am I totally off track?

Edited by Creepin_pyro, 01 December 2004 - 04:44 PM.

[moe]

hey,

by replacing chemicals by other chemicals the effect also will change. if there was a possibility of zinc-spreader using potassium perchlorate, i think, there would be some formulas, but there arent.

but i think you on the right way, because zinc-spreader using potassium nitrate as the oxidizer are also using sulfur in quite great quantities. so try and keep us up-to-date

moe

[skipjack]

searching the web i found a pretty trustworthy site, that says that Potassium Dichromate is not only used as a stabilizer, but also as a catalyst in some compositions. mainly in perchlorate-compositions though.