About: http://webisa.webdatacommons.org/149231999

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	In addition, the emulsion can be chemically sensitized with tin (I) salts, amines and other reducing substances as described in U.S. Pat. Nos. 2,487,850; 2,518,698; 2,521,925; 2,521,926; 2,694,637; 2,983,610 and 3,201,254.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com