This was due to the fact that the stained glass was worth it quite expensive. The process itself provided for several stages of work for the manufacture of a part. The manufacture itself began with the drawing project. That is, the picture had to come up with. For this, special templates were used. On which the glass used under the stained glass window, and the circuit circuit was applied along it. All that remained outside the drawing was shared, and the drawing itself was decorated with a selected color. But today everything has changed.