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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	When utilizing polyolefin film, particularly polyethylene or polypropylene film, the preferred etching composition is a mixture of chromic acid and sulfuric acid wherein the weight ratio of
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com