About: http://webisa.webdatacommons.org/327157032

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 finely dispersed voids can be produced in the material either by mechanically whipping air therein or by using a foaming agent such as a small amount of conventional aqueous or other chemical blowing agent.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com