About: http://webisa.webdatacommons.org/246617941

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	These materials include many combinations that utilize heavy metals, such as lead, cadmium, and the like that may not be suitable for release into the environment in conjunction with the degradation of the material.
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com