rich59 said:
1) If I leave a closed shoe polish tin with char cloth in my shed in the darker damper months then it can be difficult to light when I need it. In the same conditions I can usually get hand or bow drilling to work. So in this situation fire by friction may be more reliable than flint and steel.
I don't know if you noticed but a shoe polish tin has a tiny hole in the side to break the vacuum so you can open the tin, if this was not sealed the tinder would absorb moisture.
I store my spare tinder for long periods in a kilner jar.
As for reliability, I once fell off one of the Viking ships we were filming in, wearing full armour. Sank to the bottom and had to walk out.
Everything was soaked or so I thought.
The tinder and flax fibre I was carrying was damp round the edges but we still got a fire going from the stuff right in the center of my tinder box.
Took about two minutes longer than usual though.
rich59 said:
2) A couple of years back I did some experiments on natural replacements for charcloth. I hit on chared lime tree bark fibre. It lights as well as charcloth. Its main drawback is it is fairly fragile and if carried in a kit for a day would probably turn to dust. For sedentary fire lighters though it is excellent.
I had the same fragility problem with charred flax fibre. My solution was to plait the fibres before charring them, which makes them much more transportable. Might work with lime tree bark fibre too...