To determine the harmful substances such as heavy metals remaining on the mask surface of the eye. by it, the functions provided in the mask to know and mask at least once a special ink that could be added to increase the willingness to replace the mask used.
Korea Intellectual Property Service Center 17F, 131 Teheran-ro, Gangnam-gu, Seoul, Republic of Korea 06133
TEL : +82-2-3459-2843 / 2924 EMAIL : siif@kipa.org