When you want a fire just put it against a tinder bundle and with a few blows, due to the intense heat you will have flame.
Excellent stuff. It means if you manage an ember from a hand drill you can prolong the ember for a few hours and even dry out tinder on it.
A very usefull resource.
This stuff can also be used to make amadou, however it needs chemicals which are hard to collect and process in a short space of time so I don't bother.
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