6 replies to this topic

[cmjlab]

A while ago, I was experimenting with KCLO4 / Benzoate black match formulas, but misplaced my notes with the formula that worked really well.

I recall it containing mostly KCLO4, and a lesser combination of Charcoal and a Benzoate. I searched here, FW.com, and couple different books - but can't seem to find it.

Does anyone know off hand or have a functional formula?

Thanks

[tti82phys]

There are several alternative benzoate-oxidizer mixtures mentioned here, but in the context of whistle formulae for pyrotechnics.

 

https://www.phmsa.do...equivalency.pdf

[cmjlab]

I finally found my notes, thanks. I really like the stronger burning match for crossettes, AP go-getters, etc. It burns rather fiercely, and makes lightning fast, almost explosive (with one or two strands only) quick match.

Edited by cmjlab, 22 January 2023 - 08:56 AM.

[dave321]

so what did you decide to use in the end, ?

[cmjlab]

KCLO4 - 70
K Benz - 26
AFC (Willow) - 1
Sulfur - 1
Binder - 2

Mix via wet process (Oxidizer added to other ingredients after well mixed, and wet to paste for coating string)

Credit: My notes say Spitfire/APC Forum, I think he used it as a spun fuse comp.

[cmjlab]

It was nothing more than Whistle slowed down with AFC and Binder, with Sulfur added to lower ignition temp (is my non-expert opinion).

Not sure how I found it originally, or why I tried it, but I use it as a 'Thermalite' replacement (though I've admittedly only seen video of thermalite burn, never in person)

[Richtee]

I dunno what “thermalite” is..but that formula’s gonna be hotter than a.. well, I’ll skip the off color joke here