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.

At the 96-hour reading, the patient was found to have a ++ reaction to colophony and both commercial wax epilation products (Figure 1 and Figure 2). Both wax epilation products were found to ...