Things You'll Need
Instructions
Place the small pot on a fire or over the stove. Place the pitch pieces inside the pot.
Heat the pitch until it melts all the way through. Allow the pitch to remain heated until all debris either settles to the bottom or rises to the top.
Scoop out any debris from the top with a wooden spoon and discard.
Remove the pitch from the pot with a ladle, taking care not to disturb the debris on the bottom. Place the pitch in a glass container, or another pot.
Use the rock to grind one part plant fiber and one part charcoal for every five parts pitch. Mix these ingredients together to make a natural pitch glue that holds together for long periods.