The Fenton Art Glass Company was the first to produce Carnival Glass on a large scale in 1908. John W. Fenton ) and his brother Frank L. Fenton had with their team developed a relatively stable and safe method of mass producing iridized glass. They named their first lines "Iridill" and "Rubi-glass" and described it as "a metallic lustre much like the Tiffany favrile glass". Glass workers at the time called it "dope glass" because the hot glass was treated, or doped, with metallic sprays and vapors. It was an instant success with the public, with production in full swing to keep up with the demand. John Fenton is also responsible for the organization of Millersburg Glass in 1910, who, although a short lived company of just two years, produced many fine pieces of Carnival.