About: http://webisa.webdatacommons.org/431011852

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	Such a conversion coating can be prepared by any means known in the art, such as by immersion in concentrated chromic acid.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com