crackle formula of lead tetraoxide.

[Chandan123]

Can any one have loud crackle formula of lead tetraoxide/minium.

[Zumber]

But Lead tetraoxide is extremely toxic.

You must not touch it with bare hand and dont allow it to be inhaled.

Use respirator and wear gloves while working.

Crackling stars are extremely dangerous you must not use fine mesh screen to sieve it, be sure that red lead and cupric oxide is 100 mesh plus fine.

Individually screen read lead and keep it aside ,then sieve cupric oxide and keep it aside, then weight formula and mix it using normal mesh screen say 40 mesh is enough.

Sieve three times and aware of friction and impact while working.

Crackling star.

Read lead 4.000 kg

Black cupic oxide 1.000 kg

200 mesh coated magnelium 1.000 kg

Magnelium is 50:50 and coated.

Uncoated magnelium create problem.

Edited March 3 by Zumber

[Chandan123]

I tried th above composition but it does not sound that much, i think sound comes from more magnalium.

Edited March 3 by Chandan123

[Zumber]

How do you process crackling?

What standard is your NC?

Is your Read lead pure?

[CHNO]

Best of AFN3:

Pb3O4: 81.8%

CuO: 9.1%

AlMg: 9.1%

+ 10% NC laquer

My calculated Formula:

0.5 Pb3O4: 50.1%

3 CuO: 34.9%

2 AlMg: 15.0%

Edited March 4 by CHNO

[Zumber]

Thank you

[Chandan123]

i use duco clear NC laquer.

[Zumber]

Give out a try to the formula posted above, I have used it and it works just fine for me.

[Chandan123]

 I already tried that formula it is fine for fountain and small shot but not for shell.

 how much NC you use?

[Zumber]

There is no such amount.

I wet mixture and knead it well to form dough ball consistency and then I pass it through 20 mesh screen and roll it till i get 1 to 2 mm cores and dry it out in a shadow for a day and then in sun for 2 hours.

Its tricky In order to work it in a shell. It depends on how you process, what prime you prefer and how much heat your prime generates to ignite core.