hat
Ankadreman plastik, ki konpoze sèlman nan polyamid, Acrylic vè oswa résine epoksidik, se unproblematic. Sepandan, sibstans tankou plastifyan, pwoteksyon aje, koloran ak antioksidan, ki gen alèjik potansyèl, yo souvan ajoute nan pi plastik. Epi tou li nan pwodiksyon an nan linèt plastik souvan nikèl yo itilize, tankou nan gon yo oswa kòm ranfòsman metal nan tanp yo. Apre yon tan, iyon nikèl ka tranpe nan fant amann nan materyèl la ak lakòz dèrmatit kontak.
eng
Plastic frames, which consist exclusively of polyamide, acrylic glass or epoxy resin, are unproblematic. However, substances such as plasticizers, aging protection, dyes and antioxidants, which have allergenic potential, are frequently added to pure plastic. And also in the production of plastic glasses often nickel is used, such as in the hinges or as metal reinforcement in the temples. Over time, nickel ions can seep through fine cracks in the material and cause contact dermatitis.