3 replies to this topic

[tamaldas]

Hi everyone , I have made different coloured shells using stars made of BaNo3,SrNO3, Mg-Al(treated with K2Br2O7),Sulfur,PVCpwd, KNO3,Charcoal etc. Now I would like to make shells commercially to cell. But I don't know how long these shells will last &  give the same effect of light  & colour?.Also how long the lifting powder (Gun powder) will give the same effect of blasting to throw the shell to its maximum height? Can any one give me the idea of expiary of a shell? Thanks to all...

[Sparky]

I'm really not sure how to answer you, it is a very open ended question. You state you want to make and sell shells. I presume this is not in the UK?

As long as your compositions are chemically stable and dry then they can last for years but I'm not an expert. It worries me you are asking a forum something like this when you want to manufacture. 

[Arthur Brown]

Very much depends on the legislation in your country. You may need to have done life tests on your product before selling it. Check with your specialist lawyers.

[bangkokpyro]

I think if you need to ask questions like those you probably aren't ready to be making anything to sell just yet

 

Gunpowder including lift or burst charge if kept dry can be used decades after manufacture.

Most star compositions will also keep for decades if stored correctly though anything containing Magnesium I would be very wary about keeping over a couple of years at most even if protected with Di Chromate or linseed oil etc.

No offence meant but maybe it would be a good idea to read up a lot more and gain some experience before thinking of venturing into manufacturing.