First, the color bands are made. This is done by thinly overlaying a gather of opaque white glass with transparent colored glass. The mass of glass is flattened, the end held with pincers and drawn outward gradually. This still-hot band is broken into segments, and the segments are placed on a ceramic plate. The plate is thinly coated with kiln wash to avoid sticking. The bands are heated just enough to fuse, and when they’re fused, they’re rolled up on then end of a metal pipe. After reheating and marvering to make the mass solid and smooth, it’s flattened. One end is held and pulled down and folded. This folded mass of glass, with reheating and marvering, will be formed to become cylindrical. The cylindrical matrix of glass is next transferred to a blowpipe. At this point, the matrix of glass is solid and after reheating and marvering to make the colored glass perfectly
concentric with the blowpipe, blowing begins. The tip is marvered to cool it. Air is gradually blown in, and a bubble forms. The marvering is used to cool specific areas of the glass, and this will keep the glass thick in those areas. Next, using the jacks, the bubble is divided into two halves. The outer will become the vessel body; the upper will become the neck of the vessel. Blowing continues, and the bottom is flattened. The inflated glass is broken free of the blowpipe and held with a clamplike device. The conical tool is used to begin a folded edge. The end is heated, and the rim is given its final shape.