Using Copper Foil in the making of stained glass is an old technique that was popularized by Tiffany in the early 1900's. Copper Foil, with adhesive on one side, is used instead of lead in this process. It has the advantage of being lighter and stronger than lead and lends itself to projects that are more intricately detailed.

You will find Copper Foil in several thicknesses with the most common being 1.0 mil, 1 1/4 mil and 1 1/2 mil. When deciding which thickness (gauge) you will use, consider the style of your project as well as the thickness of your glass. Thinner Copper Foil is easier to use on inside curves while thicker Copper Foil is more resistant to rips and tears.

You will need to select the width of Copper Foil for your project. Rolls of Copper Foil are commonly sold in widths ranging from 5/32" to 3/8" with several widths in between. Wider foil is used for thicker glass or wider seams.

Copper Foil will oxidize if it is left exposed to the open air so you should cover your project in between sessions. Store any open-package Copper Foil in a zip-loc bag to keep it from oxidizing, as well.