Amapayi wepulasitiki ayizinto ezibalulekile ezimbonini ezahlukahlukene, ikakhulukazi emikhakheni yamakhemikhali nepulasitiki. Lezi ziqukathi ezihlukahlukene zisebenza izinhloso eziningi, kusuka ekugcinweni kuye ekuthuthweni, kuzenze zibe yimpahla ebaluleke kakhulu yamabhizinisi aphatha uketshezi, ama-granules, nezinye izinto. Ukuqonda izici nezinzuzo zamapulasitiki ayisikwele kungathuthukisa kakhulu ukusebenza.