|Picture frames||Picture frames|
|International institute to frame study||Portraits for Picture frames|
picture frames are usually made of a rectangle of wood, from four shaped pieces secured at the corners and holding a pane of glass, although some are made of plexi glass (a type of glass that is more resistant to shattering). There is usually padding material placed between the picture and the glass.
"L"-style picture frames are a simple variety that are constructed with a single L-shaped border of wood, with the bottom part of the L at the front of the frame to hold in the glass, object and backing, which are secured in from the back. In this type a picture frame, a framing mat should be used to distance the obect/picture from the glass, because condensation quickly accumulates inside any picture frame and causes damage to the picture.
"F"-style picture frames have an additional channel cut into them, which the glass is inserted into. This allows the picture to be framed without a mat and still have protection from condensation.
Other styles of picture frames are clip frames, box frames and shadow boxes, among many others.