Testing sorbitol compositions

Left to right: 
1) standard quality KNO3
2) fine quality KNO3 (using conventional coffee grinder)
3) fine quality KNO3 with 2% red iron oxide

Same sequence in movie

  

Grinding results in a smoother burn, but did not increase burn rate dramatically.

Grinding results in a suspension that is no longer pourable.
Addition of catalyst improved burn rate by a factor 2.

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