A knife is a poor substitute for a good axe and you should always use the correct tool for the job. However situations do not always go according to plan and occasionally you may find the need to split wood using your knife. Correct technique will ensure your knife remains un-damaged.
WARNING: Incorrect technique can result in broken tips or blades!
Find a suitable piece of dry, seasoned wood, as knot free as possible (knots are VERY hard and can damage blades easily). Ensure the piece of wood is at least an inch shallower than the length of your blade
Find another small piece of wood to act as a “Baton” , something around a foot long by 2” across is perfect, make sure your “Baton” isn’t rotten or cracked Find a flat surface (old tree stumps are great) to use as a safe chopping block and position the piece of firewood you wish to split upright. Place the blade of your knife on top of the piece of wood edge down, with the tip overhanging by about an inch.
Push down lightly on your knife to hold the wood in place and with your other hand bring the baton down hard on the back of the spine away from the tip.
If the wood is well seasoned it may split in one, if not your knife may now be sunk into the log with the tip sticking out an inch. If its still embedded hold the handle of the knife in one hand and with the other strike the baton (not too hard) on the spine of the tip (as far back as you can as to not damage the tip), while pushing down on the handle in time with the strike.
You may need to repeat this depending on how dry the wood is. Keep going until you are through