Pour the coconut carrier oil, shea butter and pine tar resin into the crock pot. These ingredients, can be found in craft and hobby supply stores or online.
Turn the crock pot on a high setting and cover it. Let it heat the oils for one hour. During this time, a thick foam will rise to the top; this is normal.
Microwave the jar containing two cups of water for four minutes, or until it starts to boil.
Slowly add the lye to the jar and stir it with a plastic spoon. Do this while wearing gloves and goggles to protect yourself. Lye can cause chemical burns. Set the jar containing the lye water solution aside for one hour, so it cools to room temperature.
Pour the lye water mixture into the hot foamy oil mixture in the crock pot. Stir this with the plastic spoon thoroughly. Turn off the crock pot. The mixture inside will instantly turn into a thick, fluffy cream. This is because the lye reacts with the oils to saponify, making soap. The mixture will literally reek of pine tar resin.
Line a standard cardboard shoe box with a large sheet of waxed paper. Press the paper into the corners of the box to fully line it. It's okay if paper hangs over the top edges of the box.
Pour the fluffy soap mixture into the box. Cover the box with the lid and place it in a dry and cool area for two months. During this time, your hot-process pine tar soap will cure, until the lye content is no longer too harsh to use.
