Stretcher bars are wooden frame work on which a canvas of cotton or linen is mounted for artists to work on. One can make their own stretcher bars or buy pre cut ones from art stores. A very important point in the frame is how the corners are joined. Mitre joint is most commonly used. Here, the ends or edges of wood planks are cut at 45? to form a 90? angled corner. The stretcher bars provide the support to canvas otherwise it will sag once it is painted. For getting good painting results, the canvas should be stretched taut over the frame. There should be no creases or unnecessary pulls on the canvas after it has been properly stretched on a stretcher bar.
To show off their work, artists or students need portfolio cases. There are large size portfolio cases available in stationery stores or art stores. Though there are cheap vinyl cases are available, one must try and get unique portfolio cases to present their work. After all, the way you present your work to clients and employers will speak for it. If you can get customized portfolio cases made to meet your requirements, it is bound to look different from others.