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I buy these at my local supermarket. They look like the same thing.

https://m.media-amazon.com/images/I/818sA00cFTL._AC_SL1500_.jpg

A few minutes ago, I tore the wrapper off of one, snapped the small block in two - which could easily be done with wet, cold fingers - and rubbed the broken ends together until I had a small pile of coarse dust. Again, should be easy even with wet cold fingers.

One strike with a small ferro rod and the dust, and the two halves, ignited with a hot flame.

Easy.
Good idea. I'll have to try it.

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― George Orwell

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