Oil painting materials: Stretchers
Oil painting materials: Stretchers Stretchers.—The keyed stretcher, with wedges to force the corners open and so tighten the canvas when necessary, is the only proper one to use. For convenience of use many kinds have been invented, but you will find the one here illustrated the best for general purposes. The sides may be used for ends, and vice versa. If you arrange your sizes well, you will have the sides of one size the right length for the ends of another. Then you need fewer sizes, and they are surer to pack evenly. Stretching.—You will often have to stretch your own canvases, so you should know how to do it. There is only one way to make the canvas lay smoothly…