To Make Venetian glass, you have to melt silica in a furnace to create the liquid glass, per your furnace manufacturer’s instructions. When the glass reaches that temperature, you need to gather it up on the end of the blowing pipe. You must rotate the pipe as you gather to create a cylindrical-shaped blob on the end. After that, Place the glass blob still on the blowing pipe into the cup of the glass block. You should roll the pipe to create a perfectly round ball of liquid glass on the end.
You can Return to the furnace and add more molten glass. You have to repeat the process so that you have enough glass on the end of the blowing pipe to complete your project. Then, Blow into the end of the blowing pipe. You need to cover the mouth hole of the blowing pipe with your thumb, to trap the air inside. You must rotate the pipe continually to ensure the piece remains uniform.
If the piece has not expanded enough, you should reheat the glass in the glory hole of the furnace and blow again. Next, create the final shape of the piece. Forth, Transfer the piece to the punti and finish the edge of your piece. You can Use a blow torch to apply heat to only a small area of the piece. You have to gently tap the piece off the punti. You need to place it into the annealer that allows the piece to be slowly cooled, to prevent cracking.