633 replies to this topic

[portfire]

without BHC.

Doh!! Sorry guys

[KarlosH]

Thanks.
OK, but I know this. I have Shimizu book in my computer. Potassium dichromate(CrVI) is a disgust. Make a furuncles, is cancerogenic, and I dont want no one atom in my bellows. http://henryk.borec.cz/Chrom/kuze.jpg
Pyrotechnics is dangerous hobby, mainly chemicals and their small particles in the air. I have respirator but I am still worry.
Benzene hexachloride BHC is dangerous too (volatile).
I want know any new good green composition with(etc. PVC, palron). Barium nitrate based comp.
I thing, that new compositions are mixed without dangerous dichromates and others chemicals, which are cancerogenic....or not???? I dont know!

On the video are fantastic green strobing shelles. What do you thing? Which kind/type of strobe composition is this? Strobing have a low frequency....maybe. Hm...
Sorry for my language....

http://n-joy.cz/vide...xckJc6zEC30adN/

Bye.

Edited by KarlosH, 04 December 2007 - 09:40 AM.

[W.P]

A green strobe? They looks incredible to say the least! The composition must be insanely difficult to replicate.

[bengal_pyro]

This book contain many formulas, including those for stars...and some compositions looks novel(or rather old? like use of Mica or barium benzoate)

The Preparatory Manual of Black Powder and Pyrotechnics By Jared Ledgard
Some pages are available from google books:

Check the following page

http://books.google.co.in/books?id=370UwG8CuNwC&printsec=frontcover&dq=pyrotechnics&sig=fykCO-0c8VVjzRtQBf_S1csKkyY#PPA481,M1

and for some more interesting stuff

http://books.google.co.in/books?id=370UwG8CuNwC&printsec=frontcover&dq=pyrotechnics&sig=fykCO-0c8VVjzRtQBf_S1csKkyY#PPA451,M1

[Deafaid]

I need to know if someone has tried this formula: (you can find this formula on passfire)

Ruby Red MgAl

strontium nitrate - 50
parlon - 18
magnalium, granular, -325mesh - 12
potassium perchlorate - 8
charcaol airfloat - 5
sulfur - 5
dextrin - 5
red gum - 2

Replace parlon-->pvc?

thanks in adv.

[johndee]

I have tried the Ruby Red MgAl formula, it produced a nice bright deep red with a good burn time.

[MDH]

I believe paraffin can be used as an effective delay agent for green strobes, perticularly simple ones (BaNO3/MG/PVC finely powdered) in combination with a binder. The perportions are a little weird.

[KarlosH]

Hallo. What is this effect?

Maybe wariation of crackling? Bye. Thanks.

[MDH]

Gold matrix comets with a lot of dragon eggs.

[Zinginex]

Is it possible to prime stars after they have dried. I made some KNO3+sulphur+al stars but didn't bother to prime them. Now they need priming and im wondering if i could just wet them a bit now and roll them in meal.

[Bonny]

Is it possible to prime stars after they have dried. I made some KNO3+sulphur+al stars but didn't bother to prime them. Now they need priming and im wondering if i could just wet them a bit now and roll them in meal.

That will work just fine. Don't overwet the stars. Mist them with water/alcohol and roll in meal.

[MMMMMM Pyro]

Is it possible to prime stars after they have dried. I made some KNO3+sulphur+al stars but didn't bother to prime them. Now they need priming and im wondering if i could just wet them a bit now and roll them in meal.

Have you got any H3BO3 in that mix? Perhaps something to be wary of with the Al and KNO3...

3% in your H20/C6H5OH Soln. should be fine!

[seymour]

Potassium nitrate, Sulfur and Aluminium stars can be hard to light. Meal might not be hot enough. I'd step prime.

[Zinginex]

Potassium nitrate, Sulfur and Aluminium stars can be hard to light. Meal might not be hot enough. I'd step prime.

Sorry but wats step prime lol?

[pyrotrev]

Step prime is where you put layer(s) of intermediate mixtures of the priming compound and star comp in order to give a better ignition - there's examples around the forum if you search.