There are three major types of colophony, depending on whether the source of the oleoresin is gum, wood, or tall oil. Gum rosin (the most common source) is recovered from the sap of living pine trees.

In subsequent patch testing, the female subject had positive reactions at 48 hours to menthol (in its natural and synthetic forms), peppermint, peppermint oil, colophony, balsam of Peru ...