Canvas stretcher is a type of wooden structure used for stretching of canvas before painting. Canvas stretchers are often made of wood. These stretcher bars are often used by artists for mounting the canvas used for painting. It is a wooden framework support used by artists for fastening a canvas sheet. Other than paintings canvas stretchers are also used for small scale embroidery production like providing firm tension, affixing the fabric edges with push-pins or a staple gun before beginning to sew, and then removing it from the stretcher after the work is complete.
Rectangular shaped canvas stretchers are very popular as most drawing canvasses are often of that shape. The canvas stretchers are created in different shapes and sizes according to the utility. The difference in the creation of their shapes depends on the construction of corners. Canvas stretchers are largely available at commercial level but these are often pre fabricated and are provided with interlocking corners.
Though canvas stretchers are also frames but unlike other types of frames the corner joints of canvas stretchers are not permanently glued or fixed allowing enough scope for future modification in shape. There are different types of stretcher bars available, including custom stretcher bars, aluminum stretcher bars and stretcher bars of different other types. While constructing stretcher bars they are first cut in few pieces and then joined together. Canvas stretchers rich in durability and quality are commercially available in large scale.
You can also create your canvas stretchers. By applying some easy woodworking techniques you can build your own corner supports. The corner joints matter a lot during the creation of canvas stretchers. Mitter joints and butt joints are the most popularly applied methods of affixing the corners of canvas stretcher bars. Some small keys and triangles are attached in the corners of the joints.