Original insulation trade vintage catalog for STAR PORCELAIN COMPANY, Main office and plant was located at 61 Muirhead Avenue, Trenton, NJ. Manufacturers of Thermolain, Lavolain, insulating beads, Humidolain, Vitrolain and Nu-Black. For applications where resistance to electricity, heat, moisture, chemicals or weathering agents is encountered. Disbound from a large 1949 electrical construction materials book, this unique old one page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro electric equipment library.