[fergie]

I'm missing some context here: Why do we want to extract strontium nitrate anyway?

[dmurray]

The author's home page reveals that he has an interest in amateur rocketry. Strontium nitrate doesn't sound suitable as a propellant, so I suppose he wants it to generate visual effects.

https://spiegl.org/unsorted/unsorted.html

[BenjiWiebe]

Red rocket engine flame looks really neat.

[throwup238]

Because we don’t have a Sigma Aldrich account.

[jaggederest]

And more importantly we don't want to pay.. $360 a kilo for reagent grade. Yikes.