They are prepared with two or three coats of gesso and are ready for use right out of the package
. Stretchers frames are available in different depths. The timber has to be carefully selected and stored. Then the wood is kiln dried to 11% moisture content for stability. The hinges are then cut into each end to allow the frames to expand after the canvas has been mounted. Canvas stretching is an art and only those who have expertise in this art should handle the stretching process. Wider stretcher frames may be a better choice for large pieces of art because the frame will be sturdier and thus will be able to handle the weight of a large artwork.