About: http://webisa.webdatacommons.org/375569587

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The composition can optionally include other ingredients, including fillers exemplified by fumed silica, precipitated silica, finely divided quartz, diatomaceous earth, calcium carbonate, red iron oxide, alumina and carbon black.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com