About: http://webisa.webdatacommons.org/409226513

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	Therefore, the shaping molds are made of a metal such as iron and formed to have a certain thickness so that the patterned portions are not deformed during pressing.
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com