Source: https://www.researchgate.net/profile/Yan-Sunarya/publication/305811541_RE-INVENTING_BATIK_ZEOLITE_ENGINEERED_PORE_STRUCTURE_AS_RESOURCE_OF_CONTEMPORARY_BATIK_SYSTEM/links/57a3028d08aeef8f31208f6f/RE-INVENTING-BATIK-ZEOLITE-ENGINEERED-PORE-STRUCTURE-AS-RESOURCE-OF-CONTEMPORARY-BATIK-SYSTEM.pdf