About: http://webisa.webdatacommons.org/351010804

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	Removal of color is achieved by use of porous stones soaked in oxidizing agents, such as strong bleach or permanganates, and more recently, by after treatment with cellulose enzymes to remove fiber and thereby also remove some sizing.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com