Glassblowing ..... There a few types of glassblowing Free or Mold blowing.

There is normally 3 different heaters or furnaces. the furnace, the glory hole, and lehr. Your heater/furnace needs to be about 2300 or 2400 F. The glass lets off enough heat and turns white hot. Then the bubbles come to rise out of the mass The working temp is reduced in the furnace to around 2000F Here the glass looks BRIGHT ORANGE almost fire ball like.

This glass is then rolled on a flat slab of MARBLE or STEEL This forms a cool skin on the exterior of the molten glass and shapes it. Then air is blown into the pipe, creating a bubble. Blocks are ladle-like tools made from water-soaked fruit wood and are used similarly to the marver to shape and cool a piece in the early steps of creation.

Once a piece has been blown to its approximate final size, the bottom is finalized. Then, the molten glass is attached to a Stainless_steelor Ironrod called a punty for shaping and transferring the hollow piece from the blowpipe to provide an opening and/or to finalize the top. There are many ways to apply patterns and color to blown glass, including rolling molten glass in powdered color or larger pieces of colored glass called Frit. Complex patterns with great detail can be created through the use of Caneworking(rods of colored glass) and Murrine(rods cut in cross-sections to reveal patterns). These pieces of color can be arranged in a pattern and 'picked up' by rolling a bubble of molten glass over them. One of the most exacting and complicated caneworking techniques is 'reticello', which involves creating two bubbles from cane, each twisted in a different direction and then combining them and blowing out the final form.