About: http://webisa.webdatacommons.org/229524645

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	Further, certain particles can be used, including carbon and pigments.Glass bubbles or foaming agents are used to lower the density of the elastomeric layer and can be used to reduce cost by decreasing the elastomer content required.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com