CONTACT ALLERGY DUE TO COLOPHONY .8. THE SENSITIZING POTENCY OF COMMERCIAL PRODUCTS - AN INVESTIGATION OF FRENCH AND GERMAN MODIFIED-COLOPHONY DERIVATIVES

The sensitizing capacity of 7 commercial modified-colophony products o f different origins (esters, polyterpene-modified, phenol-modified, re sinate, polymerisate) were studied experimentally in guinea pigs by me ans of a modified Freund's complete adjuvant (FCA) method. All product s showed a weak sensitizing power, but a moderate to strong irritant e ffect. Within this group, the strongest response was obtained with the calcium resinate. As most of these products are used commercially in paints and lacquers, the risk of acquiring specific hypersensitivity m ust be considered low.