Box canvas, often called stretched box canvas is very popular in the art world today, as they do not need to be framed, so the artist can save the cost of framing. most galleries and exhibitions allow them unframed. However sometimes the artist may feel his painting would be improved with a frame. Box canvas do not lend themselves to normal framing systems because of their depth, so frame makers have introduced a step frame which the canvas can be fastened to, then it is the step frame that gets framed.