What is the difference between TherMark and CerMark?

Questin-  What is the difference between TherMark and CerMark?

Answer- Ferro Corporation Acquired TherMark in February 2015

TherMark Holdings’ laser marking technology has been integrated into Ferro’s Laser Marking Materials portfolio.  TherMark’s patented laser marking technology expands Ferro’s position in the high-value glass and color markets, with its unique ability to quickly, precisely and permanently fuse marking materials to ceramics, plastics, metals, glass, and other hard surfaces.