Some years ago, a small recycling company asked the Center for Research in Advanced Materials (CIMAV) at Monterrey in the northeast of Mexico, a technology to identify PVC from PET, since the material caused them losses in their polymer recycling process. After research, CIMAV developed a chemical marker which identifies the PVC. It can be applied as a spray and in less than a minute it detects the flakes of said material.
Fuente : http://www.alphagalileo.org/ViewItem.aspx?ItemId=1...
Fuente : http://www.alphagalileo.org/ViewItem.aspx?ItemId=1...