Moulding: The frame itself is typically made from wood, metal, polystyrene (plastic), or particle/fiberboard. It is often wrapped in paper or a thin wood veneer for color.
Mounting- The method used to attach the art to the frame, with over 50 variations available.
Fitting/ Fitter: This includes assembling the frame, mounting the art, and applying the backing/hanging hardware. It also includes adding spacers to match the depth of the frame and the art.
