Hypopigmentation from UV resin additive

An employee formulating a UV-resin based vehicle developed hypopigmentation limited to the forearms without preceding overt dermatitis. Manual procedures in an automatic process provided opportunity for exposure and contact to various components. A nonresin additive, quinone, alone or in conjunction with a likely contaminant, hydroquinone, was the suspected agent. Patch tests to quinone caused severe irritation. Reactions to acrylic components were not felt to be directly pertinent.