In early springtime, the stored sugars in trees begins rising up the stem. This sugar is more concentrated than at other times of the year. A hole is drilled into the stem of the tree, a spout is driven into the hole, and the sap drips out into buckets or into tubing. The sap is then boiled to concentrate the sugars. The active ingredient in Pine Sol is pine oil, derived from the resins of pine trees.
Most turpentine is produced as a by-product of the papermaking process.
The chemical compounds in turpentine are contained in the relief gases of a pulp mill's digester - the machine where chemicals break down the wood chips.