Abstract: Decorative leaded panels of translucent or transparent thermoplastic material, such as windows, lampshades, or illuminated signs, are made by affixing metallic lead strips to the surface of a thermoplastic sheet by means of solderable securing means such as lead bolts, lead rivets or molten lead inserted through an aperture drilled through the lead strip and at least part way into the body of the thermoplastic sheet, and then soldering to complete the joint. The lead strip may delineate and surround portions of a decoration such as a painting applied to one surface of the thermoplastic sheet so that the finished article may have the appearance of a leaded stained glass window. An additional sheet of transparent or translucent thermoplastic may be applied to the decorated surface so as to protect the decoration.