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.

We have presented a case of allergic contact dermatitis from colophony found in a wax epilation product. To date, such cases have been rarely reported in the literature. Colophony or one of its ...