Instructions on how to make your own frame for an unstretched canvas.
Putting the frame together:
1. Sand all of the edges with a sanding sponge. Make sure your pieces are facing the same way and connect the interlocking pieces.
2. Using a rubber mallet, gently tap the pieces so they fit snugly. Once your frame is complete, use a ruler to make sure it is square. If it isn’t use the mallet to make it square.