Lead Came Technique for Stained Glass The material used to keep individual pieces of glass together is called “lead came”. It is an H-shaped channel that the glass pieces are inserted into and then soldered together. Lead is malleable and can be bent to fit the shape of the glass. The highest quality lead used for making windows is 99% pure, and with time, the outer layer will oxidize and assume a white hue, but that does not compromise the metal’s durability…