About: http://webisa.webdatacommons.org/266563941

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	In one embodiment, a security substrate comprising a foam layer, may be embossed to produce a substantially transparent optical security element such as a Fresnel lens, magnifying lens, microlens or other transparent optical elements.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es