About: http://webisa.webdatacommons.org/312211519

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	It seems that different materials have different spectral signatures, and by using an optical (spectroscopy) feedback system, they could stop the laser before damaging the underlying primer, or other layer.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com