Most cut and engraved glass was imported to America before the War of 1812. In the years that followed, domestic glass production increased but cutting and engraving techniques developed slowly. By the 1830s, American glassmakers were imitating the English and Irish styles of simple paneling, fluting and crosshatching glass. These cut glass designs, which did not vary widely until the 1880s, were so popular that they were the first to be duplicated in pressed glass. The uniquely American style of all-over sparkling cutting first received attention at the Centennial Exhibition in Philadelphia in 1876. Several factors contributed to this new “Rich Cut” style which remained popular from 1880 to 1915. The intricately cut glass reflected Victorian America’s love of the ornate. Also, the new fuel, natural gas, and more precise chemistry improved the clarity of cut glass. Increased mechanization contributed high speed lathes and polishing equipment which permitted deeper and more precise cuts. This period in American glassmaking ended due to the outbreak of World War I, as this decorative glass was not considered a necessary industry for the war effort.