[mpa] Thrifty BP used by the Chinese

[jharmon12 at juno.com]

I might try that formula.  The only issue one might have would be is that with heavier shells, it could burn too fast and rupture the shell.

Joel

Please note: message attached

From: Ian Whitman via MPA <mpa at kclo3.com>
To: Midlands Pyrotechnic Association Mailing List <mpa at kclo3.com>
Cc: Ian Whitman <ian.whitman at cox.net>
Subject: Re: [mpa] Thrifty BP used by the Chinese
Date: Mon, 7 Dec 2015 13:01:39 -0600


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man if we could just get bp for 85¢ a pound. This stuff is cheap!

> On Dec 7, 2015, at 12:23 PM, Bob Svenson via MPA <mpa at kclo3.com> wrote:
> 
> Here ya go Joel, another gem from Tom Schroeder - being the thrifty sort, I thought it might interest you.
> 
> Subject: Chinese black powder replacement with costs - 71% cost reduction 
> 
> Item
> %
> Yuan/MT
> $/MT
> $/lb
>  Black powder (purchased)
> 100
> 12000
> 1875.60
> 0.85
> Potassium perchlorate
> 55
> 8500
> 1328.55
> 0.60
> Charcoal
> 10
> 2000
> 312.60
> 0.14
> Potassium hydrogen  phthalate
> 30
> 9000
> 1406.70
> 0.64
> Rice Starch
> 5
> 6000
> 937.80
> 0.43
> Manufacturing
> 100
> 200
> 31.26
> 0.01
> KPH powder
> 100
> 8075
> 1262.12
> 0.57
> KPH powder is 2.33 as effective as BP
> 
> 71% cost reduction  using 1 g to replace
> 
> 3.5 g as lift in  25 mm cake shells.
>  
>  
>  
>  
> 
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