|Portrait of Nick (after cropping) 16x12", oil on linen board|
|Portrait of Nick (before cropping) 20x16", oil on linen|
This resizing method works for paintings on stretched canvas, not canvas board. Here's how I did it...
- This painting was on stretched linen which I wanted to crop from 20x16" down to 16x12". The painting was dry to the touch. I laid it face down on a piece of clean sketch pad newsprint. (Don't use plastic or wax-coated papers. They may burnish the finish and create shiny spots on the painting.)
- I cut the painting from the stretcher bars with a sharp knife, then laid it face up and moved a 16x12" frame above it until I got the composition I wanted.
- I poked holes in each corner of the framed image with a tack, then connected the tack holes on the back of the painting with pencil marks to create placement guides.
- After researching adhesives, I chose gesso (PVC glue sounds too messy). Gesso creates a secure bond, cleans up easy, it's readily available, and it's archival. I used Liquitex liquid gesso. Nothing fancy. I did a test run with some old canvas.
- I coated the entire back of the cropped painting with a slather of gesso, then laid a 16x12" board on top. I flipped the painting over (board-side down), and with a piece of newsprint for protection, gently rubbed the painting from the center out to the edges with a big wad of cloth to eliminate air pockets. I put another board on top of the burnished painting, added a heavy weight and let it sit overnight.
- To finish I cut an extra 1" margin around the mounted canvas, then folded that over and glued it to the board back with more gesso. Finally I covered the raw edges on the back with a nice piece of paper, just a bit smaller than the board. It looks good. For a simpler finish, cut the painting with a razor along the board edge. Skip the fold-over.