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.

Considering the widespread use of colophony-containing epilating products and the frequency of sensitization to colophony, it is somewhat surprising that reports of allergic contact dermatitis ...

Also, some varnishes may contain colophony, a component that promotes its adherence to tooth structure. Although there have been few reported cases, some patients have a contact allergy to ...

special fibre- use colophony, new electronic materials, new ceramics materials, alloy material and nami materials), new medicines, animal and plant protection, and seed engineering. Projects for ...