633 replies to this topic

[citron vert]

hi everybody !
please what is named this color ? (my photo)
Is it sylver reaper ?
If it isn't that color (i already have sylver star formula), can anyone give me this star formula ?
thanks
bye

[seymour]

I can not see your photo.

the composition that some people call 'reeper silver' is just Black powder (mill dust) with 20% Aluminium (usually atomised) added, with a binder. the ex firework maker 'blindreeper' did not invent it though his act of calling it 'reeper silver' was incredibly effective. It has been many years now, since he quit, and it still is in common use!

[rocket gary]

Hi all, i would like to try some Emerald Green MgAl stars

Name: Emerald Green MgAl
Source: Kyle Kepley
Barium Nitrate 50
Parlon 18
Magnalium, granular, -325 mesh 12
Potassium Perchlorate 8
Sulfur 5
Charcoal Airfloat 5
Dextrin 5
Red Gum 2

would this work with out the red gum or could i replace the red gum with some thing else thanks

[Arthur Brown]

Certainly it would work! BUT would it be as the maker originally planned. Redgum can make compounds faster so the "red gum 2" might make the comp slow if you omit it, might not make much difference. Only you could tell, if you make both mixes!

[rocket gary]

ok thanks for your help i will try it with out the red gum as i dont have any just now

[Arthur Brown]

As easy to get a little, it's a useful fuel/binder.

[rocket gary]

yeh i can get it but i just wanted to make some up just now but i think i will just order some and wait

[pyromaniac303]

I think the red gum is mainly to help the rolling properties of it. If you are pumping or cutting stars I can't see it making much difference, though if you really wanted you could increase the parlon by 2% to try and preserve the fuel to oxidiser ratio.

Also bear in mind that sulfur acts as a sensitizer to perchlorate comps, but this can be reduced by using roll sulfur rather than the higher acidity flowers of sulfur.

Edited by pyromaniac303, 20 May 2009 - 07:13 PM.

[rocket gary]

ok i would cut them any way so if i can get away with out red gum i will just use 2% more parlon im just trying to see what stars i can make with the chems i have i would say i have built up a fair amount but they dont seem to be to helpfull in makeing stars thanks all

[pyromaniac303]

OK, they are a really nice colour, the best green I have tried so far. They light every time if primed with meal powder + 20% silicon and a couple of percent of your binder of choice.

I find that the comp you need to make is always the comp that you don't have the correct ingredients for too! I'm just about at a stage after 5 years of collecting various chemicals where I can make almost everything I want, apart from the really obscure old ones using lead/mercury/arsenic compounds.

[rocket gary]

yeh thats what i am trying to do iv been collecting things over the last 7-8 months i was wanting to make green strobe stars but i could not find a place to buy Hexachlorobenzene does any one know where to get some wikipedia says it has been banned or could i replace it with parlon or something else ?

Edited by rocket gary, 20 May 2009 - 10:37 PM.

[pyromaniac303]

Hexachlorobenzene is banned in most countries, and for good reason as it is toxic, carcinogenic and accumulates in the body.

It will more than likely be used as a chlorine donor, so maybe you could try some parlon, PVC, saran or any other chlorine donor in its place.

Just try experiments with 10g or so of comp with the various chlorine donors you have so that you don't ruin a large batch of stars if it doesn't work as planned.

[rocket gary]

yeh i beleve it is the chlorine donor i will make up some test batches to see if any of my other chlorine donors will work in its place

[pyrotrev]

Hexachlorobenzene is unusual in that it contains no hydrogen, and hence will generate only Cl gas not HCl in most flames. When looking for a replacement, I guess you'll get a better substitution with something that has a lot of Cl and little H in it.

[sir steve]

List your star Formulas here

new poster

And potasium chlorate should not be mixed with copper sulphate.
black copper oxide is much saher,