homemade picture frame - Picture frames are usually made of soft or hard wood, although other materials are also used, including aluminum or polystyrene. A picture frame may be of any colour or texture, but gilding is common, especially on older frames. Some picture frames have elaborate mouldings on them, which may relate to the subject matter of the picture. The picture frame may contain a pane of glass or a plastic glass substitute such as Plexiglas, in order to protect the picture. Glass may be treated with various coatings, the most common being UV filters. Some glazings such as Denglas, Optium, and Museum glass have a coating which makes the glass partially non reflective and practically invisible under ideal lighting conditions.