On Jun 30, 2:44=A0pm, LadyKate <ladyk...@[EMAIL PROTECTED]
> wrote:
> On Jun 30, 3:36=A0pm, Deren <drexe...@[EMAIL PROTECTED]
> wrote:
>
> > I am going to be making some 2mm microstars and I was wondering what
> > would be better? lead tetraoxide(lead va****, not good) or bismuth
> > oxide. here are the formula's that i am looking at using depending on
> > which one i choose.
>
> > also, does anybody know of anywhere i can get either of the chemicals.
> > I have checked most of the normal pyro chemical suppliers and can't
> > seem to find it.
>
> > any help is greatly appreciated,
>
> > Deren
>
> I like the bismuth formulas because they seem to work even if you mess
> them up slightly. You can roll them in green meal and they will pop
> reliably. =A0My favorite formula (for either bismuth subcarbonate or
> bismuth trioxide) is:
>
> bismuth trioxide 37.5%
> copper(II) oxide 37.5%
> magnalium 25%
>
> Bind with very thick slurry of NC (15% or so) - don't ****rk on the NC,
> make it thick and creamy, dry until it can be rolled between two
> popsicle sticks (ice cream treat sticks), use plastic wrap to protect
> your roller - which can be a spare rocket tube -, cut, dry, break
> apart, and roll with green meal while lightly spritzing with water.
>
> PS: Double base or single base smokeless, or pure NC that has been
> dissolved in acetone is what you have to use. Don't use ping pong ball
> mixes or hardware store lacquer paint.
ok, thanks for that info, where do you get bismuth trioxide or bismuth
subcarbonate. can you just substitute the bismuth subcarbonate for the
trioxide?
thanks
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