How to make a mold from a glass vase/hurricane lamp for copper foil stained glass lampshade?

Lamps and lampshades in stained glass are traditionally done on styrofoam forms as you can find on sites like Delphi stained glass. To duplicate a form, build a blank out of slabs of styrofoam from hobby stores or styrene beadboard used in packing glued together with yellow or white wood glue. Mount it on a plywood disk with a rod through it then spin it with a drill press or hand drill and form it with a rasp using a cardboard or metal profile fitted to the glass (like this http://users.ticnet.com/mikefirth/castgobl.htm#ALBLOMOLD ) Using foam will allow you to put in pins, etc, to hold while you solder. You will only solder joints on the form, lifting off to solder the length of the foil and the back. You will build no more than half of the foil work at a time, perhaps only a third. Use the finished pieces to set size of next, but don't solder them together. When done with all the pieces, position them together and support with props and string to tack solder the final seams and then do the seams.

try cutting a shape out of parchment paper that is like our object. copper foil onto the parchment. it will burn when you solder the pieces but with a little ventilation, you should be ok.