Old World Colonial Crown Heavy RestorationThe Crown glass technique is one of the earliest styles of sheet glass manufacturing. Crown Glass, a heavy wavy glass, begins with a bubble of glass blown into a globe. It is then transferred to the glassmakers pontil to be rotated at speed, until centrifugal force forms a large circular plate. The finished table of glass appears thin, lustrous, and highly polished. Concentric Cords and reams are resulting characteristics of the spinning process.