Wissing and M¨uller have done some researches on solid lipid nanoparticles (SLN) as sun blocker’s carriers and interpreted their prop- erties. Chitin and chitosan attract scientists’ attentions [8] from 50s to 60s last century due to their good biocompatibility and exist in nature at large. Clausen Thomas et al. [9] have made 3,4,5-trimethoxybenzoylchitin, which was produced by grafting 3,4,5-trimethoxybenzoylchlorid to chitin, as a new UV-absorbing macromolecular in 1990.