About: http://webisa.webdatacommons.org/320715085

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	ay be produced from a plastic such as PC (poly carbonate), PMMA (acrylic), or Zeonex (made by Zeon Corporation, Japan), which can be mixed with metal oxide particles as for example MgO2 or AlO2 to make the material more scattering.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com