About: http://webisa.webdatacommons.org/52228465

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 this chemical is dissolved in water, it can be applied to a surface such as paper and an object is placed on top and during exposure to uv light, the background goes blue ('Prussian blue') and a negative image of the object remains.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com