Isovolta. Inc., located on the Cold River in Rutland, Vermont, became member of the Isovolta Group in 2003. Since the foundation of the site in 1952 mica paper, tapes and wrappers have been manufactured for the electrical industry. Isovolta Inc. produces the widest range of mica paper in North America and is the only producer with the onsite capabilities of designing mica paper to optimize specific performance characteristics required by the application. Specialized mica papers can be transformed into sample products using a laboratory pilot coaters. Current investment into the site supports our commitment to quality, innovation and technology to service our customers.