Sentence Examples


  • Another process, photoor heliogravure, for obtaining an engraved image on a copper plate, was for the first time employed on a large scale for producing a new topographical map of the Austrian Empire in 718 sheets, on a scale of I: 75,000, which was completed in seventeen years (1873-1890).
 
 

How would you define heliogravure? Add your definition here.

comments powered by Disqus

Also Mentioned In