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| SVRC... |
 Posted: Mon Oct 05, 2009 6:57 am |
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| What is the ratio of KNO3 to Boron powder for B/KNO3 igniter composition? |
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| mikes2653... |
| Posted: Tue Oct 06, 2009 8:56 am |
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On Oct 5, 7:57 am, "SVRC" <sa... at (no spam) pvconly.com> wrote:
Quote: What is the ratio of KNO3 to Boron powder for B/KNO3 igniter composition?
I don't know what any given maker might use, but the stoichiometric
ratio is 2.53 saltpetre : 0.45 boron, or approximately 85:15. This is
probably a good point of departure. Most delay and igniter
compositions are either oxygen-neutral or fuel-rich.
Be careful with boron. I know of a person, well known in the proximate
pyrotechnics industry, who was injured as a batch of boron igniter
composition caught fire while he was mixing it, probably as a result
of static electricity. |
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| Lloyd E. Sponenburgh... |
| Posted: Tue Oct 06, 2009 7:16 pm |
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mikes2653 <ekim2653 at (no spam) gmail.com> fired this volley in news:81e252eb-6f4b-
409b-9017-6a8bfe9d0ed2 at (no spam) g6g2000vbr.googlegroups.com:
Quote: Be careful with boron. I know of a person, well known in the proximate
pyrotechnics industry, who was injured as a batch of boron igniter
composition caught fire while he was mixing it, probably as a result
of static electricity.
And rather shortly after that accident, his motivation lapsed, other
business issues invaded his life, and he stopped plying his trade.
(The injury was neither trivial nor life-threatening... but it tipped a
"scale" somewhere in his psyche.)
One should be cautious with things of which you're not familiar. I had a
similar (potentially life-changing) incident with 2u magnesium, but
fortunately it didn't end my enthusiasm.
LLoyd |
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| SVRC... |
| Posted: Wed Oct 07, 2009 4:29 pm |
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Thank you! I will heed your advice and use an anti-static wristband
grounding strap and wear nothing but cotton clothing.
I don't run A/C or heating yet in the shop so static buildup should be
minimal.
"Lloyd E. Sponenburgh" <lloydspinsidemindspring.com> wrote in message
news:Xns9C9CD865392D9lloydspmindspringcom at (no spam) 216.168.3.70...
Quote: mikes2653 <ekim2653 at (no spam) gmail.com> fired this volley in news:81e252eb-6f4b-
409b-9017-6a8bfe9d0ed2 at (no spam) g6g2000vbr.googlegroups.com:
Be careful with boron. I know of a person, well known in the proximate
pyrotechnics industry, who was injured as a batch of boron igniter
composition caught fire while he was mixing it, probably as a result
of static electricity.
And rather shortly after that accident, his motivation lapsed, other
business issues invaded his life, and he stopped plying his trade.
(The injury was neither trivial nor life-threatening... but it tipped a
"scale" somewhere in his psyche.)
One should be cautious with things of which you're not familiar. I had a
similar (potentially life-changing) incident with 2u magnesium, but
fortunately it didn't end my enthusiasm.
LLoyd |
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