After selecting a style of frame based on the image you want to display and the size of acrylic panels used in the frames, cut the stiles (A) and rails (B) for the frames from 1/2-in-thick material (Project Diagram, Cutting Diagram and Cutting List). Frame styles 1 and 5 have an additional rail (B-2). Assemble the frames using glue and clamps (Photo 1) and (Project Diagram, Drawing 1). Clamp scrap material (clamping cauls), across the joints while you assemble the frame so the board edges align flush for a perfectly flat frame that requires less sanding. Use painter's tape on the edges of the clamping cauls to prevent the glue from sticking.
Note: A frame is composed of two elements: vertical elements called stiles and the horizontal elements called rails. Cut pairs of stiles and rails exactly the same length for frames that will assemble with ease.